FWIW, the two God of War games released on PSP were considered some of the most graphically impressive on the platform. Both came out late in the console's lifetime (2008 and 2010).
An IGN review also described one of them as "it looks better than a big chunk of PS2 games". [0] I've played one of them and yes, it felt like playing a resized PS2 game.
[0] https://web.archive.org/web/20121020044819/http://www.ign.co...
Yup, this game was playable on 32MB ram pocket size console with graphic so good and detailed!