Erm, there wasn't much difference between kotor on x-box and pc and I'm sure it will be like that in kotor 2 too.
Sure, the pc-version has slightly better graphics, but that doesn't really matter much at all. Loading times? My x-box is modded, loading times were faster on my x-box than on my pc. (kotor 1)
I kinda feel sorry for you pc-users though, if the game was pc-only it would've been a lot better (especially graphic-wise.), I think everyone agree when I say that?