Difficult choice, but both are great resorts. Some things may help you make your decision. How long will you be staying? Will you be spending most of your time in the parks or at the resort? Do you like to stay up later than the kids? CBR-great pools, which means you have more choices if the main pool is crowded. Beautiful grounds for walking, playing in the sand at the beaches, and a large playground. The island is fun too. Also bike and water craft rental available. The rooms are very spacious, tons of storage. Pluses to ASMo-advantage of two rooms, for privacy and extra bathroom. Bus service is good, only one stop at resort. My kids seem to love the food court better, not quite sure why? More activity, good selections. Theming is so fantastic for young children, you really feel like you are staying at Disney!
Just something to consider, if your stay is long, switch so that you can enjoy both resorts.