At what? Flying? If so... Air Force.
Grabb ass? If so... Navy/Marine.

Actually... I don't think you can actually compare the two since there is significantly different missions/responsibilities between them.
I do have one observation from my military existance at a shack near EOR at an airforce base:
Navy pilots are the worst land landers on the face of the earth. They drive the plane right into the runway and bounce once every time. Then again... I've never seen an Air Force pilot (or navy pilot for that matter) land on a carrier.
AKDejaVu