I see a lot of people arguing about multiplat games in general looking better on 360, but I'm not seeing any actual proof. Where are the pics?
Allow me to relate my direct experiences in this matter, those are the games I had a chance to play on both consoles:
Mass Effect 2 - Looked the same graphically, the only small difference I felt was a slightly lower framerate (irrelevant, since the discussion here is "graphics").
The problem in Mass Effect 2 was "graphics" based. The PS3 version is weak at dealing with transparent alpha effects in direct comparison with the 360, and Mass Effect 2's atmospherics can smother the entire screen with alpha, sapping performance.
Crysis 2 - Looked the same too, framerate felt just as bad as the 360 version.
Crysis 2 runs at 1152x720 resolution on the 360, PS3 operates at 1024x720. Both had inconsistent problems though.
Marvel vs Capcom 3 - pretty much the same thing on both consoles.
Pretty even, you're right there. However, if you're a hardcore/pro fighter you want the 360 version, especially in tag-team. The PS3 version's timing is off due to frame drops.
Then I got a PC upgrade and started playing multiplat games only there, but I still got the chance to try two games that used UE3 on PS3, never tried them on 360 though, so I don't know if they run differently:
Mortal Kombat had some weird particle effects, they looked very pixelated.
Very close visually, the texture work on Reptile looks very odd on PS3.
Texture filtering is better on the 360, sporting higher levels of anisotropic filtering (AF), whilst the alpha buffers - smoke, fire and so on - are rendered in quarter resolution on the PS3 . As you mentioned, only some effects are filtered so you get those "pixelated effects" you mentioned.
Other projectile effects/specials feature a lighter upscale on the PS3, thus looking almost identical to the ones on the 360. There is also a difference in the way lighting is handled across both formats. The intensity of the lighting given off by certain special moves is noticeably lower on the PS3. It almost looks as if projectile attacks aren't bespoke light sources, when they in fact are.
Bioshock 2 took years to start because of a mandatory hdd installation, when I finally got to play, looked like it was running on 320x240, but it wasn't even nostalgic, just disturbing. I had better things to play.
Again, on the PS3, transparent alpha textures cause some problems and there are graphics "glitches" due to this. They attempted to go the Killzone route where they render at like a quarter resolution vs the 360s higher res render allowed by its RAM (Killzone 2 does this(not sure about 3)), which results in some funky stuff.
