We have stayed at both and are going back to Movies this January. Go in expecting a value and you will be fine. When we stayed at Music our first room was in the Country section. I swear it was the most remote in all of WDW! That walk back to the room each night was brutal with 3 small children in tow. I eventually got desperate enough to ask how much more for a preferred room and the CM surprised us and gave us a family suite at no extra cost! It was such a nice surprise!
We had a room in the Mighty Ducks section when we stayed at Movies. It was super close to the Music bus stop and food court so we just used them.
We enjoyed both our stays and received excellent Disney service.
We are going back to Movies this January because their rooms have all been refurbished.
Happy Planning!