BC or CSR?
Both, of course, have pluses and minuses.
BC
PRO: Fabulous location; proximity to "backdoor" of EPCOT; Stormalong Bay; Beaches and Cream; nearness of Boardwalk; boat to Studios
CON: Price (other Deluxes cost less, but are not as close)
CSR
PRO: Beautiful grounds; quiet; romantic; price; best moderate, in my opinion; good pools; large hot tub
CON: Location-must use car or bus to get to all parks (we had no problem with the bus service)
I've stayed at both and, as much as I love the ability to walk into EPCOT, unless I can find a really good deal, I can't justify the cost of BC. If I want a Deluxe, I would choose AKL over BC for less money and a more relaxed atmosphere. To save more money by staying at a moderate, it will be CSR for me. Loved it and hope to get back soon.
All things being equal, I'd choose to save the money and go back to CSR.