For a comparison between the same games on different systems (Wii vs. Gamecube) the Wii does seem to have greatly improved graphics. They compared Madden and Cars on the Wii and the GC. It looks like ...

If what I saw online is not a product of file compression or anything then it seems that the PS2 version will be a lot jaggier than that of the Xbox, not to talk about the lame Tekken bonus character ...