I watched both of them the same year. Though it's possible I watched some of the original when I was very little? Maybe? I guess I don't have the full "nostalgia" factor for the original (which is wonderful, of course) that many bring to it when comparing the two, in that I didn't grow up with it.
And I do love both films, so I'm not trying to make it into a battle or anything like that. But in the Burton version, I feel like I'm entering another world, as though I'm exploring a magical chocolate factory that very few are allowed to enter. The Wilder version (and I'm not saying this as a bad thing) has pretty schlocky production values by comparison, and since it comes from the era of "somewhat budgeted" cinema from the 70s, it sort of looks more like a TV show than a movie. Money and effects limitations also prevented a proper ending for the naughty children that proves they
aren't dead, and heck, I even think the Christopher Lee backstory for Wonka works in a pure Burton kind of way, and helps give the story a more satisfying emotional conclusion than the original (which ends abruptly by comparison).
It also helps when Grandpa Joe actually comes across as a 90+ year old, as opposed to a man in his mid-50s who's too lazy to bother to get up. Again, that's part of the charm of the original. But it is another factor that makes 2005 one "better" for me (and haters gonna hate, but I think Depp is fantastic).
There. I've made my defense. Do I get to keep my staff privileges now?

"Yesterday is history, tomorrow is a mystery, but today is a gift--that is why it's called the present."