Yup, what @migxmeg said, basically Webtoon makes you pay for early access, but if you don't want to, you can still read their premium series for free, you just have to wait a little longer... unlike Tapas, where quite a bunch of premium series appear to be permanently locked behind paywalls (save maybe for a few discounts/free gift episodes).
As someone who makes funny comics nsfw borderline, Tapas is the go for me.
They deleted a chapter where some breasts were showing (nipples were not even drawn), i don't have the time/energy to censor every single patch of skin in panels, or worry about if a chapter gets censored.
In Tapas, if there's something sexual i just add the mature label and be done with it.
Here in Spain there were magazines in the 70s and 80s with covers and content you'd be sent to jail nowadays.
Mobile apps are a cancer to creativity, welcome to 2021, where censorship is harder than 50 years ago.
So, Tapas.
Initially I wanted to post on Webtoon since that's the app I used as a reader. Then I decided to start posting on Tapas first and see how that went, and... I absolutely fell in love with the community here. It's really friendly and makes it easy for a newcomer like me to interact with other artists. So, for now, as a creator I'd say Tapas but I intend to post on Webtoon as well eventually.
I don't push my tapas post so much., So far I've always had a better response on Webtoon, so I gravitated there. I've since started a shift back to regular updates on Tapas, so we shall see?
Also I don't like when Tapas yells at you in red when your analytics drop by 0.1 in the space of a day... it's very discouraging. It's like having your teacher mark red on your test and being like:
Tapas: NO, DO IT AGAIN!
Me: ...but it was 0.1% and it was a da-
Tapas: YOU FAILED, AGAIN!
I prefer Webtoons in general, I like more design of the page and app it's easier for me to find smaller creators and theirs comics than on tapas where I'm totaly lost to find them, so I'm looking for these on forum. And because of that it's easier to find reades on webtoons as well. But tapas has more engaged community and readers.
It really depends on your needs. Both platforms have their own pros and cons, depending on what you need:
Tapas:
-As a creator, I have better success here than in Webtoon. Which is surprising because I'm told Webtoon has a bigger audience. Most likely because my comic fit in the popular genres of Tapas (Romance and Fantasy). Also because my art style is anime-like, which Tapas prefers. If yours doesn't have that, tough luck.
-Encourages community with both creators and readers. Really helpful especially when you're starting out.
-Has better creator support. I wouldn't have that many subscribers if I wasn't alerted of subscriptions, comments and likes to build a following on. Has lower requirements to get paid. Easier to manage your work here too.
-The UI is cute but as a reader, I hate that you get railroaded to read the popular and favored works. It's also harder to navigate and discover works on your own.
-They promote more studio made comics. In all my time as a reader, I've never seen any non-studio comic get involved in their ink promotional activities like being featured in new releases where you need to read at least three chapters to get ink. I don't read much here because their recommendations are bland. It's always the same tired isekai with overpowered mc or rewritten villains/villainesses and fantasy comics with uninspired and overused East Asian/European dressing.
Webtoon:
-it's the Wild Wild West out here, both as creator and reader. As a reader, you'd probably awed at all that opportunity for adventure. There's lots of diverse works to discover out there, in terms of topic and art styles (not limited to anime only) and Webtoon lets you do that more easily. And it's more supportive to you in terms of searching for comics, keeping track of what you read and alerting you. Also, you can enjoy their originals with some patience unlike Tapas where they hit you immediately with a paywall (but Tapas gives you a lot of ways to get ink to pay for that whereas Webtoon is too miserly with giving you coins and nickels and dimes you so I guess they're even?). As a creator tho, it's as bare as a frontier. Very few supports at all; you gotta build your own tools. No community present to build your following; you gotta build your own. Their discord is just like a corporate bulletin (their twitter and insta are fine tho). It won't alert you on what your readers are doing; you have to find out yourself whether anyone commented, liked, or viewed your work. Their user analytics is bad; it doesn't tell me anything useful. I haven't been around long as a creator, but I've read a lot of creator gripes regarding Webtoon than Tapas. Lots of contract shenanigans, where original creators are regularly dungeoned for not hitting improbable metrics like half a million subscribers on launch, and very high requirements to get paid.
It's been a long time since I posted a comic on Webtoon and Tapas at the same time. However, through Tapas I met many artists and writers who I am still in contact with.
With Webtoon, they were silent readers, it's not bad, everyone interacts as they want, but,... maybe it's because I like to read comments from time to time. Also, I didn't have that many subs there.
I'm on both but I like tapas better. There's a forum here it's warm and friendly to meet creators and fans and readers. Webtoons is hard to chat with other creators and readers. All they have on Webtoons is comments, and their new follow feature profile page which does not help much. Both platforms are great for sharing your comics btw. But I like tapas better. Not only the formus, but tapas cares about your comic/novel the have goals for you to achieve, stats on how your comic/novel is performing I really like those features. Webtoons should give creators these features as well.