User blog comment:JAlbor/Wikia at E3 2012/@comment-6656386-20120522030403/@comment-1854594-20120524040044

I would think the reason for that is that it is probably primarily developed on 360, then ported over to PS3. I'm assuming that's how it works when they make these games, at least. Make the primary version on one system and then port it to the others, and perhaps they just haven't been doing as good of a job as they should with the PS3 port.