I have only played Alice Cooper once and it was hands down bar none the worst game I've ever played (Yes worse than Rogo)
so not complete enough for me to judge.
IMDN is very good (if you can deal with the music...somone 'fixed' it with nerw music yet?). Fun, intersting, display goals are cool, layout good, ramps are a little tough.
I only played Houdini once and it seems pretty packed. The shots were tight and hard *cough* which isn;t a bad thing. Def interesting.