In my opinion:
Webtoon:
- Implement a better notification system
- Implement user profiles and a wall, or atleast a way to notify readers outside of the comic
Tapas:
- (I don't know atm 
, I don't use webtoon that much nowadays)
I want to say, it would be beneficial for Webtoon to have a novel section similar to Tapas. (However, Naver recently acquired Wattpad, so they might have something in the works for that.
It would probably do them some justice if they also had their own dedicated forum (but for some weird feeling, I think they would more likely have a toxic community due to competitiveness, than the homely-knit Tapas community)
As for Tapas, they can definitely work on making the app more smooth and optimised. It is not as smooth as Webtoon (and webtoon even has much more content). I think they can also work on updating the UI (especially for searching).
Furthermore, I think the uploading process on webtoon is more simple as well (but that is probably a preferential thing, someone confirm this?)
Devs, take notes 
EDIT: Webtoon has an implemented and dedicated Patreon button for creators. I think it would be awesome for Tapas to have a dedicated Ko-fi button 
webtoon:
any notification system (I'm a desktop user and I there is no sign on the site even of series I'm subsribed to bewing updated - why I'm not currently reading anything there)
baing able to upload episodes out of order, adding any kind of update there is such a pain if you're scheduling things in advance...
tapas:
scheduler which lets us use our own timezones instead of some random in the usa
multiple genres actually working
Webtoon
- A notification system for creators to be informed when someone comments on an episode. I don't want to trawl back through EVERY episode whenever I get a large number of new subs. (I do it anyway, but it's a pain in the butt.)
- The ability to delete individual comments.
- User profiles.
- Some sort of tipping system, even if it's just Ko-fi integration.
- Ditch the rating system!
I don't think Webtoon need a forum, their new Discord is great. (And it's actually super sweet and supportive there!)
Tapas
- More quality and variety in their Tapas Original content. I think this is one of the big things which limits audience growth here. Tapas caters to a very narrow demographic with the content they push the hardest. Either push the Community content way harder, because there is much more tonal and genre diversity there, or incorporate more tonal and genre diversity into the Tapas Original library.
- Ditch pay-to-read. It's a big turn-off, and drastically limits the amount of comics a reader on Tapas will actually read. Webtoon have monetised successfully via read-ahead and ad revenue while keeping their Originals free-to-read, which again, has resulted in them having a way bigger audience.
- Push the Community content more. Webtoon have been nailing this lately with their monthly Canvas celebrations, it'd be nice to see Tapas do something similar. And the front page of the app is like, 60% Canvas at this point. We have more space than the Originals, haha.
- Both the app and the website are kinda confusing, sometimes buggy, and could use a UI overhaul.
- Better Patreon integration.
Comment moderation.
I see basically weekly stories of people getting extremely gross comments on Webtoon and they have no option but report and watch as nothing gets done. It's just pushing smaller creators out.
On Tapas' side, better discoverability and app fixes. The site gets super focused on the original content which is has very little variety, even though there's tons of free to read stuff that could help remove the reptutation of being just an isekai library. The app is just missing so, so many features from the browser version too, which ends up harming more than streamlining the experience.
Webtoon:
A notification system. Why creators can't be notified of new comments and likes is beyond me, seriously .__.
A list of people following you. I mean, I realize that this can be kind of a double-edged sword: on the one hand, I like the idea of having some "privacy" when following someone on Webtoon and I fear that having public lists of followers would dramatically increase the number of people subscribing to you only because they want you to do the same with their series (aka the dreaded sub4sub that also plagues Tapas)... but on the other hand, it IS true that knowing who your followers are helps creating a better sense of community and can also help finding other creators who make amazing content. Seeing just a bunch of numbers, especially when you don't get a whole lot of comments is very... alienating;
Possibility to delete unwanted comments;
Get rid of the ratings;
Higher character limit for series descriptions + social media links for all, not just Original series;
Better scheduling options. I just want to have a bonus episode between two already scheduled chapters, why do I have to delete the most recent episode to do it? D:
More ways to earn coins, e.g. by watching ads like Tapas does with Ink. I don't generally use coins to unlock episodes, but from what I seem to understand, on Webtoon you either have to buy them or wait for one of their Canvas Marathon events (which barely give you enough coins to unlock 1-2 episodes, AFAIK). Given that the great majority of the Webtoon audience is way younger than that of Tapas, I think they could really use a system to make their comics more accessible to an audience that seems to be mostly made of minors and students.
Tapas:
Definitely get rid of paywalls on premium series and opt for a "read ahead" model à la Webtoon.
More diversity in featured genres, both premium and non-premium. I was incredibly happy to see this week's staff picks, not just because my own comic made it to the list (wheeeee, still can't believe it
), but because finally, FINALLY, I saw more comics in there with a variety of art styles and genres, unlike what's usually featured on the home page of the site. I would love it if Tapas could expand their horizons more, both by doing events to feature more community-created content and by publishing more premium series that aren't just the same style/genre over and over again. As I mentioned many other times in the past, I don't think that the current premium series are "bad" or whatever: the art styles are cute, the stories are not what generally interests me but seem compelling and overall I can see why they're popular.
However, it really does feel like the site as a whole is very narrowly focused on just ONE specific style/genre, to the point that anyone looking at the homepage may not even realize just how wonderfully diverse this platform is. Although I wouldn't call Webtoon the epitome of diversity as far as art styles and genres go either, they DO tend to feature a bigger variety of stuff, which helps bringing in a larger audience. I think the Tapastry Discord server and the events featured on there were a pretty good step forward in that sense, and I definitely hope to see more events dedicated to the promotion of community created content in the future
Sub-genres that actually work. I love how on Webtoon your series can show up under both categories you pick. Would love it if Tapas could do the same: makes it way easier for people to find series they might be interested in, as well as giving overall more visibility to creators.
Supernatural, historical and animals genres. And perhaps thriller, short stories, informative and all ages too. Not sure if post-apocalyptic, sports, superhero, zombies, inspirational and crime would be big enough to get their own categories on Tapas, but I definitely know that we have plenty of supernatural comics scattered all over different sections, as well as stories featuring historical settings and animal/anthro/furry comics.
hard second on the webtoon featured genres thing. At this point, the featured comics on tapas is so samey that it's starting to look like it's just randomly generated previews made with some kind of algorythm, like there can't be that many works that are functionally identical... right?
Yeah, well, both platforms have a tendency to focus a lot on romance and fantasy in manga/manwha style (specifically the "big eyes, pointy faces, tiny noses, lots of flowing hair, pastel colors, cel shading and frilly clothes" one) but, among Webtoon Originals, you can still find a good variety of styles: from the extremely simple and cutesy drawings of Smile Brush1 to the gritty semirealism of GremoryLand2, from the traditional looking artwork of Wolfsbane to the digitally colored cartoony style of Just Pancakes1... and then there's of course Lore Olympus, which may be a romance, but is definitely not drawn in a manga style they're not the majority (hence why I wouldn't say that Webtoon is super diverse either), but they are there. The home page of the site also seems to pick up on your preferred genres after a while: I used to have a lot of recommendations for romance stuff at first, but once WT seemed to realize that I was searching for supernatural/horror/sci-fi the most, it started recommending me stuff in those genres instead (although the occasional romance recommendation DOES happen sometimes XD).
Which, now that I think of it, is another thing I'd love to see on Tapas: recommendations based on your favorite genres and "comics" and "novels" sections showing you a bunch of different genres based on your preferences, instead of defaulting to "romance" for comics and "fantasy" for novels.
sorry, i mistyped in my original response! I meant tapas, rather than webtoons! But now I'm glad i did rather than embarassed because you gave me lots of great recs for comics!! Thank you!!!
i am Not a fan of webtoon. They need to ....
1. have profiles. It is so lonely over there
2. have any ability to interact with your engagement, be able to see your subs, to find the comics made by people who are commented on and liking your stuff
3. no more rating system please god
4. notifications?????
Tapas, my beautiful child...
1. pls fix the app. i love the website but the app is purgatory idk how to do anything.
2. make sure the website isn't down every three seconds
For a while I thought I had 0 readers in Webtoon because I wasn't getting any comment notifications. It took me a while to realize the Comments tab was only there to keep tracking my OWN comments j;dskfjsaj
So I think Webtoon can benefit from in Tapas's creator-friendly features:
- reader comment notifications
- ability to delete reader comments
- flexible scheduling system
- tags
- no ratings
and Tapas from Webtoon's reader-friendly features:
- better mobile UI
- feature more diverse stories than Korean/Chinese romance fantasies and isekais
- maybe have more free-to-read translated stories? those seem to draw in more people to an app versus only having paid ones
I think Tapas can also do more to support tapastry community creators. Even just looking at the front page, the translated overseas comics are flooding the top, and community comics in the bottom.
Interacting more with creators on social media will be a plus too, since then more creators will begin advertising their Tapas to get the attention of the Tapas staff.
I think it's because it's all getting translated from Kakao works. They existed over the course of several years and followed trends a bit slower, but now the english versions just get thrown at us in rapid succession.
oh! that actually explains a lot! I didn't realize they were translated works, I thought tapas was... Idk... commissioning lots of nearly-identical comics, netflix-style aha
Webtoons
- remove rating system
- better notification for creators
- better moderation for comments
- better break down of views, likes, followers so that creators can track progress
Tapas
- better effort to appeal to a international audience (non-American/Canadian)
-- this may also include options to easily access non-English comics/novels
- Better diversity of style and genres on the front page.
-- I often feel like the site puts more effort to promote romances (usually with a fantasy angle) which have a very anime or anime inspired style. I just feel like in the past, there was such a bigger range, with sometimes comedies and horror appearing on the frontpage as well as some with really interesting and very different art style. Now I feel like you only sometimes see that stuff in Staff Picks.
Tapas:
A button/bar on the mobile app instead of the small "next page" or having to scroll (its the smallest thing to ever bother me but its one of the reasons I prefer webtoon)
I prefer Tapas' UI over Webtoon's, but Tapas' UX is hot garbage
Webtoon:
Remove ratings
See what comics users created/profile
(I just read on Webtoons, so idk what else lol)
For Webtoon
- a more proper notification section, since I never know when I get likes, comments or subscribers.
- a profile page, so it's easier to see how many series a creator made, and learn more about the creator.
- have a forums page, most sites have them, including DeviantArt and Comicfury.
- be able to change episodes around and publish them as freely as you can on Tapas.
- be able to have options to easley get coins to unlock the three extra episodes on some series, like and ad service and what not.
- a section for novels.
- maybe a different style of dashboard since I never really notice the site news until I accidentally scroll down to far, or just so happen to see it.
For Tapas
- have the ability to add a Patreon/Kofi button.
- more genres for our series'.
- make discoverablaty a bit easier.
- maybe some more font options for novels.
Hey Reveal!
I would say that it would be nice if WT had better notifications especially when readers comment on your series and it would be nice to have a profile page or a forum other content creators can communicate with each other on. I believe that a forum with professional and experienced admins would do the site good. I actually quit WT because an admin from a Facebook group started h@rassing my personal account.
For Tapas, more sub-genres and discoverability would be nice. Like if a newly updated series can get bumped up for Fresh and two other genres I think a lot of undiscovered series can get light 