I found some comparison screens that show the difference between Ninja Gaiden Sigma 2 (PS3) and Ninja Gaiden 2 (X360). Here are some:
EDIT: For some reason the pics wont show so just check the link to the page. Can someone put some pic plz?
For more pics check here: http://www.gameswire.net/comparisons/ninja-gaiden-sigma-2-playstation-3-vs-xbox-360-comparison_26.html
I think the PS3 version looks a lot better; but what do you guys think?