IMO, the biggest perk for YC in your scenario is the fact that you can walk to two of the four parks. Its all buses from SSR (save for Disney Springs), and the current bus situation with limited capacity makes it challenging. But since you will have a car and can drive, this is a moot point.
Honestly, SSR will give you considerably more space, a washer/dryer, and $400 in your pocket. Plus, you're walking distance to Disney Springs. We spent more time than ever at Disney Springs on our recent trip with the lack of nighttime entertainment and shortened park hours. We are not normally drawn to SSR, but we even commented how now would be a great time to try it since its so convenient to Disney Springs, where we were spending a lot of time.
I do understand that SAB is a more appealing pool, but when are you going? Because SAB is so popular, I'd be concerned about crowds and capacity. People stay at YC/BC FOR the pool, so its inclined to be busier than any other, especially during the hot months. If you want a more relaxed pool atmosphere, that would be another reason to go for SSR.