On the top set of pictures, Id give the Radeon and GF2 a tie for best. The V5 is close. The only difference I see is the large rock on the right has a rounded look on the GF2 and Radeon. The V5 does not show this.
On the bottom set of pictures, I'd say the background looks best on V5, then GF2, then Radeon. The monster looks best on the Radeon and GF2 (tie) and "different" on the V5. It looks "flat" compared to the others. Its obviously missing the bump mapped effects. It gives it a different look. With the bump mapping it looks reptilian, on the V5, it looks kind of "hairy"?? I could see someone having a preference for the V5 look. The bump mapped textures would take some getting used to. They seem a bit over done.
All 3 look good. Looks like an awesome game (eye candy wise anyway).