I don't know how much my opinion will mean here, as I've only stayed at CSR so far, but i've done lots of research about CBR as my family will be staying there in August.
We absolutely loved CSR, the only downside being the size.
We loved walking around and exploring, but getting from the bus stop to our room at midnight every night after a long day in the parks wasn't our favorite part of the day.
Of course it would be easier if we had been closer, but we noticed quite a few people with small children having the same problem.
Obviously if you aren't travelling with children or don't plan on spending long days in the parks, this won't be an issue, but this is the only problem we had there.
On the other hand, it seems as if CBR might be even larger (one website said 75 acres
larger but i'm not sure if this is correct), but it's not looking like this will be an issue since CBR has the internal busses.
Anyway, CSR was beautiful and CBR looks beautiful, so i'm sure you'll have a great trip in either, but I think it just depends on who you're travelling with, and yours or your families preference!
