WOZ
It just has such a fresh feeling to gameplay and a unique layout, coupled with the gorgeous lighting and display, that it just feels great to shoot your way through it, watching it come to life and choosing your path through the adventure.
ACDC, I enjoy a lot. If the poll was for the better strictly tourney machine, I'd say ACDC. But to be honest lately, I've found it to feel a little stale after a few games when playing by myself, compared to some other Sterns like MET, IM, Tron, etc.
I bounced from ACDC to Tron to IM last night at a friend's house and ACDC just fell a little flat in comparison. That's not bad-mouthing ACDC necessarily, because IM and Tron I find exceptional. I agree with Rob, if you're going to compare toys, compare toys. A fair comparison for the WOZ mini playfields would be the ACDC mini, which while it is challenging at first, after a couple goes at it I find myself feeling "Is this over yet?"
Now I don't find WOZ mini-playfields to be outrageously awesome in feel-good kinetics either (are any mini-playfields, really? WWFRR maybe does it best), but they gel with gameplay a so much better. You are constantly forced to factor in your progress towards each mini in WOZ when calculating and recalculating your strategy, often being forced to avoid them until the time is right. Of course the added bonus of action on the minis with other balls in play on the main.
I like both WOZ minis. The Munchkin pf isn't quite as nice as the Castle pf, but has some fun quirks and challenges like completing the loops with 2-3 balls up there and bringing them all into a Munchkin mode. Castle pf is just cool. The first time I saw that design I thought, "Why not a couple small flippers up there instead?" But the one flipper works, and is fairly balanced in terms of skill. You can hit the Rescue loop 7x in a row and then go several games in a row where you never loop it twice. Of course the way the Castle is qualified is cool, surviving the SDTMs off Winkie guard hits until you make your way into the Castle, or tricking that Flying Monkey to drop you right in. Better gameplay integration.
The WOZ minis are comfortably sized, so you don't lose anything on the lower playfield, and yet have enough real estate for upper pf challenges and fun. WOZ is a better design than people give it credit for. It's not all about the tech. You appreciate the design the more you play it. The two biggies for some people, which I do understand, are the brutality of the exposed Tree bumper which sends deadly missile towards Toto early and often...and the other is the absence of a left ramp, which leaves some right-handed players without a real satisfying shot to keep flow going and complete the yin/yang. There's more than enough different and unique about WOZ to make up for those two design 2nd guesses that for we know was tried and either didn't work or wasn't possible.
The ACDC design is a cookie cutter tried and true layout we all know and love. It's nice in that it fits comfortably, like an old shoe, and yet holds no real surprises or new kinetic challenges. Like a great cheeseburger. But after years of cheeseburgers, a gyro pita with cucumber sauce is like filet mignon. The cheeseburger is always going to win the poll, though.
Touch matchup for WOZ so early, go on to make us proud ACDC.