I know the style looks the same as the comic books because I've fvcking read them, alright? Will you get off my goddam case already, go find someone else to harass or I'm going to have to complain to the forum admins.
As usual you've not thoguht your post through. Just because a comic is successful doesn't mean the looks will be kept when it's turned into a movie (X-Men for example where they all got new costumes), or the concept (the Mask, where all the blood and gore was replaced with Jim Carrey), or the background (both Spiderman and The Hulk, who are now products of genetic engineering rather than radioactivity), or the director might decide to cast a dork in the lead part (Michael Keaton as the Batman... Jesus!)
So as you see, things frequently change when comics become movies, and the typical superhero comics are much MUCH more mainstream than anyone could ever say about Sin City to begin with and still got changed, so thus it IS surprising the movie adaptation is as faithful as it seems to be.
So, just like, make like a tree and all that, alrighty?