I just see aliasing but an overall sharper image. I wouldn't worry about it though. Just play the games they are very good.
I'm playing resi 3 on xbox now and it looks amazing but it's dark as fook! Haha
Maybe it's just me but I'm not really noticing the RT stuff and 'difference' in GI in RE3 as much as in RE2. Looks like more of the effort went into RE2.