I really agree with the poster who mentioned CBR's better quiet pools, but CSR's better main pool. And also about the ability to enjoy the Illuminations (the high up fireworks part of that show) and the bright color theme at CBR as being pluses to that resort. All of those were things that appealed to my family and made CBR our favorite mod by a hair over CSR. I will also add that the CBR rooms have double sinks, which is nice for families. CBR also has a very reliable internal bus system vs. the golf carts CSR has that seem to be a luck thing as to whether or not you get one or not if you desire to cut down on some walking. CBR also has preferred location rooms which is nice if you want to assure yourself of being close to the main areas.
If you enjoy having room service, then CSR is the winner since its the only mod to offer somethings besides pizza delivery. CSR also has a full service spa and salon, which again, puts it more on the level of a deluxe in the amenities department. It definitely caters to the business traveller and the often less crowded buses to the parks and pool area(s) prove that further.
CSR's food court is really nice, if you plan to be on the
DDP its a great deal, they have some more upscale selections vs. the other food courts. They do add a 10% gratuity however, so if you are paying out of pocket that can add some cost. CSR has the Maya Grill which is a wonderful full service restaurant. CBR has Shutters which is also very good, but I found the atmosphere at Maya Grill a bit more quiet and nice.
Both resorts have incredible theming and feel like a vacation within a vacation. At both you could never go to a park and still have a lot of fun!
In the end, both resorts are great and you cannot make a bad choice. CSR generally wins the popularity polls here on the dis, not exactly sure why since I think CBR is just as wonderful! If all else fails, flip a coin!
Oh and be aware (you may be already) that CBR's main pool is going under refurb the first half of 2008.