my quick thoughts:
overall i, too, prefer wilder's wonka. i tried really hard not to compare the 2 wonka movies, because they are just so different, but i guess i cant help it. things i liked better or equally in a different way in burton's film: mr. and mrs. bucket (i was surprised, i was sure helena bonham carter was gonna do something outlandish with the simple role, but she played it beautifully), agustus gloop (LOL VERY funny in this one), mike teevee (as a genius kid who watches too much tv and yet was able to "break the system" and only buy one bar, and then follow up with "i dont even like chocolate" - ha, great), i liked the idea that wonka was NOT good at public speaking, that was actually quite charming and nice in terms of an improvement, and deep roy was fantastic, but not *better* per say than the old oompa loompas, whom i loved as a kid and still do (and yes, i too can sing all their old theme songs ha)...oh and this was a biggie: acting-wise, the new charlie bucket (freddie highmore) was far better IMO, even though i liked the depth of the role in the original - i wish highmore could have had a shot to act some of the moments from the original....i felt like, once we got to the factory, it became the johnny depp show, and i *do* love him, dont get me wrong (i enjoy watching him act, no matter the part), but in terms of the overall story it felt imbalanced (considering it *is* called CHARLIE and the chocolate factory, this time around).
it's funny, some things were more clear in wilder's wonka, some in depp's...i liked in depp's character how clear it is that he doesnt like kids and people and visitors...with wilder, this isnt so clear (he seems perfectly at ease with letting people into the factory after having it closed for so long)...and yet, wilder's transformation in terms of his relationship with charlie is a lot more clear and fleshed out than depp's is - and alas, i wasnt a huge fan of how burton did the flashbacks...in theory (story-wise), i think they add a lot, but poorly executed.
and finally, the visuals: some were absolutely wonderful - i simply loved the sideways bucket house in the middle of industrial london or wherever it was...and yet others, like the chocolate room (with the river), besides the waterfall itself which was more realistic than the one in wilder's, i much preferred the chocolate room in the original - the new one was just so OBVIOUSLY burton w/ all the strange curling plants and nothing symmetrical that i was getting a bit of a headache (and i can take a lot of burton in a single dose, i like his style generally).
overall, twas okay, different than the 1st, and does have some new things to offer to the story...but nothing to jump up and down about.