We stayed at All Stars Music and Dolphin in September. Had never stayed at either before. Overall impressions:
All Star Music - cheaper, adequate accommodations, faster transportation to MK & AK, no jacuzzi. Not bad at all for the money.
Dolphin - rooms somewhat bigger and much nicer, more expensive, slower transportation to MK and AK since bus stops at all Boardwalk hotels. Loved walking to Boardwalk and Epcot, loved taking boat to MGM and Epcot. Had a full size closet - 4 drawers in bureau, desk and small table. Had vanity area and dressing table with lots of plugs. IMHO, you can't beat staying at an Epcot resort.
Would be happy to answer any other questions.