Tecmo Koei's Dynasty Warriors 8: Xtreme Legends has been released in Hong Kong on the same day as the PS4 and user Nugasel decided to post an interesting screenshot comparison on the popular Korean message board Ruliweb.

The screenshots, that you can see at the bottom of the post (click on them to see a full ssize version), show a very visible difference especially in lighting (much less flat and lacking dynamic shadows in the PS3 version), texture quality and resolution, and normal mapping. The PS3 version also shows a lot more aliasing around the hair of the character.

[Thanks for the tip, A-Drei]