What foo said: some Fenders are better than others, MusicMan is a more stable product.
+ 'my' humble opinion: I had a Fender Mexico (active five string type) and the electronics where kind of wack. No headroom, the pickups distorted very quickly.
The Stingray on the other hand ... headroom for days, even on your low B.
BTW: what kind of MM and Fender ? (year, type, finish, condition)
Herwig