While FF XIII is superior on the PS3, it looks like Resonance of Fate/End of Eternity is looking noticeably sharper on the 360. I suppose this isn't too surprising considering that Tri-Ace's SO4 also looked superior on 360 hardware. They're obviously more comfortable there.
Comparison: http://www.microsofttranslator.com/BV.aspx?ref=Internal&a=http%3a%2f%2fd.hatena.ne.jp%2fyoda-dip-jp%2f20100202