i've only stayed at the BC so I'm partial but we loved the pool and the proximity to epcot / WS.
The Grand Floridian has a yankee candle smell to me LOL. My husband has many allergies so I havent had any pretty candle smells in 15 years in the house so I'm not used to them
We're staying at the Poly CL in a few weeks so we'll see if it changes my mind!
my choice would be gf. i don't believe we will ever stay at bc again. we enjoy staying cl and were very disappointed in the experience there. i do believe that there are plenty of People who enjoy bc cl on here, however i don't believe i see it favorably compared to the gf cl very often. good luck planning!