We have stayed at both CBR and Swan many times and we love them both!We stayed at CBR when dd was younger and now that she is older we usually pick the Swan, especially when a good rate is available.
These are our observations
Disney theming - you feel like you are on a tropical island at CBR and the little one love the disney touches i.e. disney toiletries, Mickey calling to wake them and start their day. The Swan is a beautiful hotel. But it is a convention hotel and all those poor "suits" are wandering around looking envious.
food court - CBR has a better selection of reasonably priced (by disney standards) dining options geared to kids. At the Swan you need to go to Tubbis, which is a great place, but you must walk over to the Dolphin. This is not a big deal for us, but we no longer have small children
pool theming - The Swan and Dolphin share the Grotto Pool which is very nice. We have found that the water temp is usually a little cooler at the Grotto pool than at the Disney pool.
Room comfort - The rooms are smaller at CBR than Swan. And the beds.....well there is just no comparison, The Swan wins hands down on the bed issue. CBR has regular hotel double beds. Swan has queen size heavenly beds which are pillowtopped and have down bedding.
Unless it has changed since our last stay at CBR, they have the window unit style air conditioners which tend to be kind of noisy (probably the only thing that I can honestly said I disliked about CBR.
CBR is outside entry style rooms (think motel) and Swan is corrider style entry (think hotel). I don't think the difference is that big a deal but I know some people prefer one over the other.
Location - The Swan location is convenient if you are spending a lot of time at Epcot and MGM. Both are within walking distance - about 5 -10 to Epcot and 15-20 to MGM. It is also within walking distance to the Boardwalk if that is of interest to your family.
Driving or taking WDW transportation is the only option to anywhere from CBR. However, we always found the transportation to be very efficient. We have only had a car on site once, so the parking charge at Swan wasn't that big a deal. At least they finally got rid of the "resort fee".
I have always felt that CBR was a more calming atmosphere than the Swan/Dolphin. When weather permits, we like to take a break and head back to the resort for some pool time. It just seems to me that CBR is more removed from the Park frenzy than the Swan.
Price - Using rack rate, there is no question that CBR is the better deal. But if you are eligible for any of the many discounts offered from the Swan/Dolphin (i.e. govt/military/teacher/nurse/
aaa/aarp/dis/ etc) sometimes you can come pretty close to the CBR and it is not unheard of to even do a little better than CBR in price.
No matter which one you pick I am sure you will have a wonderful experience. Enjoy!!!