Well, I own both and I have to admit that I'm unlikely to ever make a passive bass. My 3 passive basses (Epi EB-3, AXL Player Deluxe and Fecker Imprecision (heh)) are all very well and good, and fit particular purposes (like classic rock) but for sheer variety of tone available I can't see past active.
I can set my first custom build to make mud (all bass no treble on the MM neck pickup) to twang (all treble no bass on J bridge pickup) and lots inbetween. I added a 2EQ circuit to my OLP MM3 and opened up the tonal possibilities - as a passive bass it was pretty limited by the odd electronics (linear pots, eh? you might as well use switches, OLP). My fretless Squier Bullet build will be EMGed (EMG-P), as will the Zebrano Wideboy 5 (EMG-40J (bridge) + EMG-40P5/DC/CS (neck, undecided yet) + EMG BTC system 2EQ).
I'm not being down on passive basses, but it's all about flexibility. I don't know enough to say if active electronics lose some mystical passive tone, but seeing as I don't believe in mojo (your car doesn't have mojo - it's just a wreck, your suit doesn't have mojo - it's just scruffy, your bass doesn't have mojo - it just needs repaired), I'd want some experience of this tone based upon repeatable experiment (same bass passive and active) to evaluate the difference. Until then it'll be a case of "played some nice active basses, played some nice passive basses" and purely a preference based upon a limited set of parameters.
Having said that, there's something inexplicable stopping me putting an active circuit into the EB-3. I suspect there's not much tone to be unlocked from the mudbucker/mini bass humbucker combo. Not that it's immune to other tinkering - got a Hipshot Supertone bridge coming for it soon