Overall, both bullpens are pretty even in terms of experience.
The back end of the Yankees bullpen, with Rivera and Hughes, is better than anything the other three team's in the playoffs have. This is pretty much indisputable.
It's important to remember that, against the Angels, there is only one lefty in the lineup. Against them, the importance of being able to match up lefty lefty is small. However, I never said the Yankees' were better equipped to get out lefties than the Dodgers.
I just think that the Yankees bullpen, overall, is better (mainly because of the back end). I also don't think that Kuo, Belsario, Troncoso, and Weaver are any better than Chamberlain, Aceves, Robertson, and Coke.