They really can vary from place to place so you would need to look at location. Some Marriotts are nicer and newer and some are older and rather dated, and the same goes for Sheraton. IMO, I would also look at other properties within the same chain - i.e. Westin is part of Sheraton, but tends to be higher end, the same with Renaissance hotels which are part of Marriott. My husband has traveled on business to Orlando quite a bit and likes the Autograph collection hotel there by Marriott. It is downtown, though, not near Disney if that is what you want.