Well, I haven't stayed at AKL....yet ( 76 more days to go & that will be a different story, lol)
But, the Beach Club is my all time Favorite WDW Resort. I am NOT a fancy person at all - WDW touring attire for me is a pair of cut-off levi's & a tank. I felt perfectly comfortable at BC -
The CMs there were great, the location is fantastic, the ambience relaxing, light & airy, the Pool!!!, Beaches & Cream at your fingertips, gorgeous rooms & if you are lucky, a wonderful patio or balcony to enjoy a quiet morning cup. Strolling along Crescent Lake in the early AM to Boardwalk Bakery for a delicious pastry..... Heaven, really. We were lucky enough to have a patio from which we could hear British Invasion & see Illuminations fireworks.
I'm betting that both are Magical in their own ways & if you aren't too bound in loyalty to AKL, you will have an equally Magical stay at BC - Different, but still Magical.