We've done Tusker and Chef Mickey's for breakfast. We would pick Chef Mickey's, even though the food is more generic, since we had a bad experience at Tusker. Still, so many of the character meals are inconsistent...so, you'll find a pretty even distribution of people who enjoy both, just one, or just the other. In light of this, I recommend picking the one that has more appeal to you. Here are the factors I'd consider...
1. Is it more important to you to meet Daisy or Pluto?
2. Is price a factor? (Chef Mickey's is more $)
3. Does the location of one fit better into your schedule than the other?
4. Not sure if this is still the case, but Donald didn't sign autographs at Tusker when we did it- will this be a problem?
5. Which menu appeals to you more?
As for the tea...never done it, but I have some friends who have. One of them really liked it, while the others felt it was a bit of a rip off. I've walked by it a number of times though and the girls all seem to be enjoying themselves.