This is an extremely... different and wierd comparison. Kind of like comparing Krispy Kreme to Coca Cola...
I'd have to go with Twisted Metal. As much as everybody loved UC2, I *hate* Third Person Shooters. I can't stand it, can't get the hang of it. I hate how your camera looks one way, but you can turn your character right around and start running towards the camera... I just don't like TPS, so I wasn't able to enjoy Uncharted as much as I could have...
I remember my first time playing Twisted Metal 4 player splitscreen while sleeping over a friends house. We didn't sleep.
"Being single is easier on the gaming life, and the wallet."