I think this is very unique to comics in print. Historically print comics in the US followed a particular type of style model, and the companies expected to see all their artists sort of fall in line with that style in order to create a uniform looking product. Writers change a lot, and I will admit that in recent years changing the artist in the middle of a run has become much more noticeable than it has in the past.
Manga in Japan and even other countries like Korea and China, stylistically is actually hugely vast. This is because most publishing companies did not require their creators to match a style guide or storytelling model. So you get any kind of style from CLAMP's unique look, to Akira's look. There are also huge genre categories in manga that also dramatically affect style (https://animeworldthelandofmanga.wordpress.com/2016/11/01/the-5-types-of-manga/) where most western comics are super hero genre. (Not to say all, Image and Aspen comics have a much wider selection of comics outside of super heroes)
Anyways, then you take a look at webcomics. Webcomics are sort of their own beast. First, I'm seeing that many webcomics are moving to the vertical scrolling format. That's unlike anything being done in print, western or manga. So comparing them is just different. Those who draw webcomics are from all over the world. Taking inspiration from their own local art culture, whatever that might be.
For me, I grew up watching anime, but I only started drawing comics after I got married and my husband is a HUGE Marvel/DC guy. So, when I was learning to draw comics, I was using Spiderman and Batman as reference in terms of panel flow and storytelling. But I think I have strong anime/manga influences, especially from Miyazaki movies. So my webcomics would be some weird hybrid mix. I also really love Alphonse Mucha's art nouveau, so that's sort of mixed in as well.
I also produce my webcomic in print and I find its sort of a struggle to fit in. The anime folks say I'm too western and the western folks say I have too much "anime influence." So I'm not really sure what crowd to join to be honest. Fortunately lots of people who make webcomics are like me, so I hope we all band together. 