Yesterday i got Assassin's Creed 2. But before i wanted to start it, i wanted to finish Uncharted 2 since i was on the last 2 chapters. So i finish Uncharted, sat throught the credits and after it saved, i directly popped in AC:2. It was a big mind freak for me. I probably should have taken a day off before starting it. Obviously the visuals are just not on par, and i totally forgot the controls from the first Assassin's Creed and my mind was still in Uncharted mode, and started trying to use those controls in AC:2. I died a few times in the beginning of the game.
 
Long story short, going from Uncharted 2 right into AC:2 is a bad idea... for me anyways. I think im gonna restart a AC:2 tonight.

Yesterday i got Assassin's Creed 2. But before i wanted to start it, i wanted to finish Uncharted 2 since i was on the last 2 chapters. So i finish Uncharted, sat throught the credits and after it saved, i directly popped in AC:2. It was a big mind freak for me. I probably should have taken a day off before starting it. Obviously the visuals are just not on par, and i totally forgot the controls from the first Assassin's Creed and my mind was still in Uncharted mode, and started trying to use those controls in AC:2. I died a few times in the beginning of the game.
 
Long story short, going from Uncharted 2 right into AC:2 is a bad idea... for me anyways. I think im gonna restart a AC:2 tonight.

I would think that going from Uncharted 2 to AC2 would be a good idea.  While the controls are very different, I found the climbing/platforming in the Assassin's Creed series to be superior.  I still haven't played AC2 yet, but the first game still has the best platforming mechanics I've ever played in a game.  The animations of Altair jumping from building to building looks amazing.  Meanwhile, Drake sometimes does this huge leaping gesture (but only jumps two feet) while other times he makes a jump look effortless (even though he leaps over a an eight foot gap).

Started Playing AC2 last night and my brother was watching.  Once Lucy's (thats her name, right?) face popped up and she started talking, he went "OH GOD!  That is not good!"
After playing Uncharted2, the graphics on AC2 freaked me out.  The gameplay transition wasn't so bad for me though.  @Andorski said:

" The animations of Altair jumping from building to building looks amazing.  Meanwhile, Drake sometimes does this huge leaping gesture (but only jumps two feet) while other times he makes a jump look effortless (even though he leaps over a an eight foot gap). "

What AC2 also does that Uncharted2 does is the character physically shows whether he can make a jump. "

" Started Playing AC2 last night and my brother was watching.  Once Lucy's (thats her name, right?) face popped up and she started talking, he went "OH GOD!  That is not good!"

Yea, the face graphics look way worse than the original AC from what I remember, and Lucy looks like a clown whore.
 
But the environments are a lot better in AC2 than AC1, and they have dynamic time of day unlike AC1 & Uncharted 2 (and they're more open than U2 as well).

i never have any problems going from one game to another graphically. I dont really compare, and I tend to think most ps3/360 games look really good (maybe because I never had a gaming pc before)