This is such a hard question and I love them both! But I have to go with maple just because of the durability and it's a simple looking wood that goes with everything.
Ash has gained my favor in recent times, my experience with the Slaydawg has improved my perception of ash (not that it was bad to begin with, i just loved how maple sounds). Ash doesn't take much to break in, and when they do, they turn into excellent stall machines!