The Ghost vehicle is the definitive example otherwise the rest of the pictures are bad screen shots to make any comparison. But Reach's graphics are better. The Ghost displays it perfectly.
WHAT!... XP shows better graphics.. Look at the 4th picture.. Look at the cliff on the right XP textures are much better. You need explosions though and bullet impacts and such.. so you can see particle details and effects. But In the environment, XP seems to look better Vista is a piece of crap its a massive Memory hog.
durio's comments