Delgado has a ton of upside. Burnett does not. Even if he goes to the NL, it won't make him an ownable SP.
I agree about Delgado, but disagree about Burnett. I wouldn't classify him as non-ownable.
Lets look at the positives here-
Burnett is a good bet for 190 IP or so. He could go more, but that would be gravy.
Burnett still has a very impressive K/9, especially during the second half of 2011. In fact, he had growth in the second half, but it was suppressed by his very unlucky 36%H against and a 68% strand rate.
Burnett generally does not perform as well as his underlying stats indicate. He is an average pitcher, not the abomination of ERA he currently produces.
Burnett is going to PIT- less HR, MUCH weaker division, easier park to pitch in, and gets a boost in K's from facing pitchers now.
Burnett would be leaving the NY Media market- sportscasters have routinely bashed him for years now. Maybe the small market in PIT has a calming effect.
And the negatives-
Terrible walk rate. No sign of improvement. A weaker division might help a tad, as AL East quality hitting more than dwarfs NL Central hitting (especially without Pujols and Fielder now).
He gives up way too many HRs. But again, moving to PIT will help to remedy this.
All in all, I'd be more than happy to grab Burnett with a late round pick in a redraft league if he does in fact get moved to PIT.
Delgado is a prospect who will probably need more time in the minors, but he is a keeper over Burnett in keeper/dynasty leagues. But it wouldn't surprise me in the least if AJ had an above average 2012. Just draft him late.