Quoted from bbulkley:
Thanks so much for all your thoughts! I played both on location this weekend and I agree on several points. Wonka was honestly a bit annoying to me in terms of sound. DI was more approachable for my kid (and me) and the layout flowed better for us, and we both liked the gadgets a lot more - especially the theater. Something about Wonka felt a bit cheaper to me, which probably isn't fair but that's the impression I got.
Both seem like they would shine in a home environment. For us the moving target, pinball2000-esque theater, multiple magnets, and impressive animations made DI a winner. I'm ordering one this week.
Good choice! Either is good. You will enjoy DI a bit more especially if you play casually with kids or guests. Both are great bangs for the buck compared to some other games for sale.