So I watched some playthroughs on youtube from the first hour of the game
and it seems that both versions have lots of tearing and frame-rate drops (especially while in combat the frame-rate looks like it always takes a hit in both systems) with PS3 being the worst of the two...also spotted some LoD problems that seemed more profound on the PS3 version.
The mid-level loading for some reason in the vids I saw was taking more time on the 360 version than the PS3...either way it looks like it could get really distracting later in the game, hopefully it will not be that bad when installing the game.
Still can't wait for DS2 since it looks awesome but it's disappointing to see that DS2 probably has a worst frame-rate than the first game...I guess the "bigger scope, more ambitious" vision definitely has it's cons.