Which aircraft is more manueverable?

I would say its nigh impossible to say for certain, but it is very close between the SU-47 and the F-22, as the 3D thrust vectoring of the SU-47 could possibly be matched by the 2D thrust vectoring of the F-22. For a fully functioning aircraft, the F-22 wins as the forward-swept wings of the SU-47 are still in experimental/prototype stages. For dogfighting, the F-22 is far superior because of its stealth. There are quite a few forums with talks about this subject, but are all based on youtube footage and mere speculation. The only way to say for certain would be to have an actual dogfight between the aircraft, but that obviously isn't going to happen any time soon.