Quoted from Rdoyle1978:I have both as well, and I agree. I play both of those games almost daily, but Houdini has WAY more going for it long term.
Ditto on both previous posts. MB is a great machine and new players can have a lot of fun after just a few games. Houdini is more challenging with a lot of unique (and difficult) shots. I also like his harrassing call outs on missed skill shots and ball saves.
With some patience you can find nice used examples, but that varies greatly on your location.
Good luck, but you can't really lose on this one!