Of course, it's Jasper.

Depends how you look at it... Edward just doesn't feel the need to kill people as much as Jasper does, so, from that view, he is better xD
I could mention my other points of view, but nobody wants to spend half an hour reading that xD

i have an entire list of things:
1. i love him
2. i love his gift
3. i love him
4. i love his mystrious air
5. i <3 jasper

i actually love both but i luv edward the best