IGN:

These big open worlds, which are fully interactive, do come at a severe cost on PS3. There is considerable texture pop-in and noticeable framerate issues. Playing back-to-back with the 360 version, it's obvious that Ubisoft did not devote enough resources to the PS3 edition. The framerate is considerably worse, so much so that it begins to affect gameplay in the later levels. You can get through the first two-thirds of Assassin with the framerate being just an annoyance, but it becomes more of an issue for the final third of the missions.

They are a year apart.

so now its achievements and not games.. lol.. Arsenal325

I think it's both.

Didn;t IGN say this:

These big open worlds, which are fully interactive, do come at a severe cost on PS3. There is considerable texture pop-in and noticeable framerate issues. Playing back-to-back with the 360 version, it's obvious that Ubisoft did not devote enough resources to the PS3 edition. The framerate is considerably worse, so much so that it begins to affect gameplay in the later levels. You can get through the first two-thirds of Assassin with the framerate being just an annoyance, but it becomes more of an issue for the final third of the missions.

You guys i'm just trying to give you my unbiased facts about the ps3 and it's progress it hasmade and will continue to make.

Friendlyfire53

Don't you mean lack of progress.