Hard to say ... I mean Superman is fast. He has travelled at lightspeed. Now Thor can also travel fast, but with the speed of sound. There is not that much difference ...
Then again Thor can lift 100k easily ... but Superman has lifted some good weights also, like these asteroids in the picture ...
Now people say that Thor uses Magic and Superman is weak to magic. Thor has several different magic spells ... Eh, the power of thunder and then somekind of energy beam through his hammer ... and he can also teleport or bring forth a vortex. Like 3 differents spells ...
Then again Superman has done some amazing features also ...
http://www.youtube.com/watch?v=oKMVnZDDksM