http://img143.imageshack.us/img143/811/game2007012710320826zplns0.jpg -
http://img149.imageshack.us/img149/4103/tv2007012713142300li8.jpg
Oddly enough, the overall palette is very different. The PS2 version has a slightly more colourful palette. The fog seems to be lacking in the PC version. There's obviously no shading on the dog or Leon. Anything in the distance is a jaggy mess. The only defense for the PC version here is that you see the details of Leon's model a lot better.
http://img143.imageshack.us/img143/458/pcatk9gikjoyxpvs2.jpg -
http://img149.imageshack.us/img149/5052/tv2007012713174700bu7.jpg
The lack of shading and lighting is even more apparent here. Leon's hair looks very different though, and quite similar to how it is in the GC version. Which makes me believe that certain models and textures from the GC version might be used in the PC version afterall.
http://img143.imageshack.us/img143/3933/game2007012710314610zu3bb1.jpg -
http://img149.imageshack.us/img149/6200/tv2007012713134600nt0.jpg
Either the fog is really far away in the PC version here or there's no fog whatsoever. Either the PS2 version has trees which are blurred away by the fog, or the PC version has a lot more trees and foilage. Leon's hair definitely uses a different texture (that, or PS2's shading makes the hair looks very different). Leon's jacket seems to be identical.
http://img262.imageshack.us/img262/4027/game2007012710302774qnqvd3.jpg -
http://img149.imageshack.us/img149/5333/tv2007012713193400am3.jpg
Closeup of the same villager (only difference is that he has a hat on the PC screenshot). The villager clearly has a much more detailed model and texture, probably implemented from the GC version.
http://img149.imageshack.us/img149/6269/game20070126213050407vgqn3.jpg -
http://img149.imageshack.us/img149/1231/tv2007012713203100mk9.jpg
Note that isn't in the same scene, just the camera angle and Leon's pose is the same. The textures of Leon's jacket and pants are definitely better in the PC shot here, but it could be just due to the PS2 using a mipmap texture.