I haven't seen any other same-name games on the site split up even if a split is warranted. If Sonic Unleashed is one page instead of 2, then shouldn't Powerslave be one page as well? According to the wiki pages on this site, it's the same name, released almost simultaneously, identical storyline, same genre, same general premise, same assets/sprites, same developer (now this I was surprised)... just an entirely different game on console. Well boo hoo, virtually all of that applies to Sonic Unleashed and on top of that it was actually an entirely different dev (Dimps) that made it.
Then again, maybe it is meant to be split up, and I'm overreacting. Maybe just nobody brought it up before, that's all. In which case I will make this a merge/combine request and provide links to both wiki pages on the site: