This it's not my favourite anime (of course, better than Madoka ¬¬) but the music was so good (also better... ¬¬)
The plot of PH could be around the same league as Madoka's in quality, but the rest... How do I explain it? Imagine Madoka made with constant chibis and gags popping out of nowhere, SZS and Mesousa cameos during the tragically famous ep 3 scene, pantsushots being the main emphasis of transformation scenes, Homura
actually stalking Madoka... That would have done the show no good. Luckily, Shinbo knows how to balance acid and serious sequences; the director of PH apparently didn't. The Carroll-esque setting of PH indeed asks for some theatre of absurd included, but the studio either went overboard here or didn't care to fix the manga's issues (if they originated there). As a result, PH was nearly killed by constant mood swings which were nowhere near predictable, and barely saved by the plot itself, some characters and the soundtrack. I already said that the series would have been better off in Shaft's hands, since its setting and themes should be familiar to those folks. Or, if anyone here is allergic to Shaft, at least make it Bones - aren't they the ones who usually adapt Square Enix manga anyway?
If nobody but Xebec's staff intends to ask Yuki to the stand in this series' OST, then it is THE ONLY reason to justify them handling Pandora Hearts further.
As to the music... it's two-cour vs one-cour, with the ratio of knockout themes naturally higher. Also, PH is a shounen, requiring more drive and upbeat music. It's not a BeeTrain-esque OST, meaning it has its share of transition BGMs, and if you snored through some tracks in Madoka, you'll likely snore through some tracks in PH (although most of them were packed in OST 1, pretty much the situation we have with Madoka). And I have my own questions to the sound director, too, e.g. regarding the heavy underuse of Contractor.
Otherwise, I can't decisively place one of these works far above the other. Both carry out the mood just fine, both sport a bunch of unforgettable tracks whereof each alone would make a lot of other OSTs out there shine.
why does it get written so slowly?! 
