Untamoi on 03 March 2010
You can't compare sequel of the game on the same console. U2 used same game engine as U1 (altered but it is still the same engine) and they probably reused or just tweaked a lot of textures, animations and characters. They didn't create everything from scratch, a lot of code was just tweaked from last game. So, they didn't actually make the game in 1+ year because a lot was done BEFORE they even started doing U2.
PS3 is very complex and programmers are still learning multi-core programming. Most PC programs and games still can't use quad-core CPU's properly and even dual-core support have come to games quite late. And Cell is much more complicated than quad-core CPU.
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