These are two of our family's favorites. I prefer CBR over CSR but dh prefers CSR.
CSR: Pros: Very beautiful resort. The lake in the center makes for such peaceful walks at night. Our room was fine, I do think the CSR rooms a tad bigger. Transportation was fine, but we were a bit farther from the bus stops every time we stayed even though we requested closer. We hoped each trip!
Cons: The Food Court. We haven't been since it changed to buffet for lunch and dinner. Before, it was the most confusing food court ever when on the DP. The Mara Grill was a nice little rest. though, it was walkin the whole trip and we had to change a few plans and ended up here. Food ok but the CSM's there are really great. How long it felt like it took to get to any Park. Had a convention center feel. It was strange to see business suits on vacation!
CBR: Pros: I like the bldgs seem closer together, makes a 'close to the bus stop room' very close. I love the tropical theming and my kids love the pool. I know others feel it is a long walk to the food court from some areas. We have always been granted our request to be in Aruba, and feel the walk is fine. Very peaceful. I like the Food court and the gift shop. The food court is not confusing at all, I am on vacation my brain turns to mush, I can't do complicated!

I love how close we are to Epcot and DHS, a 5 minute ride!
Cons: The transportation is hit or miss, a definitely can be a long wait for a couple buses especially MK. And they are always crowded. I know its a large resort, you just don't realize til its time to get on the bus!
Either way, you can't go wrong. Both are great and I would stay in either one with no regret. HTH
Kelly