When I'm bored as **** I will somtimes try to EQ my basses around to make them sound like each other.
I'm not sure what kind of Jazz you have but the stock pickups in my Geddy can get a pretty good MM sound with the mids boosted and a little on the bass too, with tone nearly wide open and a strong right hand attack.
It's not dead on MM, but it punches and snarls like a MOFO. A Bongo is the only MM I own which is a really clean bass, but I can get pretty close to that with my Geddy as well, at least how fat it is, but not the piano like clarity.