Love both - had FP and sold it. Yes you have to work for multiball but then once you get it the balls drain because of the brutal outlanes. It's more about working towards multiball rather than the actual multiball mode itself. It might have been better with Oliver's mission-based ruleset.
Many more interesting things to do on BK (magnasave, ramps, third flipper) and better artwork IMHO. If I can find one in good shape at the right price I'll buy it.
viperrwk