This is one of the hardest ones I've ever considered as I have and love both games. I've owned WOZRR for about three years and Houdini for about 2.5 months. I'm with Tuna with regards to all the Houdini hate, are the shots tight? Yep but they are all absolutely make-able, the Milkcan loop is quite similar to the Crystal Ball shot on WOZ and the scoop is not too different than the Throne Room either (though I think the scoop is the easier shot). Woz's ramp is not a gimme and the left loop through the pops is also challenging. They are both very kinda quirky games compared to a fan layout, which is great when you have several fan layout games too. Both games will absolutely kick a newbie's ass, and often still kicks mine as well but I keep coming back for more on both. Having Rescue, Emerald and a Crystal Multiball all going while trying to start a Munchkin mode is about as good as it gets in pinball but Man From Beyond with Trunk and / or Seance MBs on Houdini isn't too far behind it. If I absolutely had to choose and money was no object I'd probably take WOZ because there is more there (five flippers two mini-pfs, spinning house, monkey, Haunted Forest modes, etc), if you consider the price difference Houdini would be a lot harder to pass up though.