IMO the only thing AKV has a pro over SSR is the animals, view. If you are not sav. view. I think you miss the only reason to go there.
SSR is in the middle of all the parks. Walking to DTD, Artist Pall. is best/beautiful QS. Parking close conv.
AKV is a 45 min bus ride, adding standing room only is tough, with little ones. The view is fantastic, but does not make up for the distance to Epcot, MK and HS.
The pools are very comparable, but SSR has more options. The staff =, For only 3 days the travel time will eat up a short trip.. UNLESS you are not going to the parks, my choice is SSR 100%.