If you r in China now, you might still need to consider the time limited for VISA. Even the last two admitted you later, is it still enough time for you to get Visa.
If you are in the NA, my suggestion is to pay the deposit first (the most lost is just the money, but remember to tell them to withdram as soon as you got better choice), at all "one bird in the hand is better than two in the bush", not mention that IVEY and W are all very good schools.