We just returned from Embassy Grand beach, 3 bedroom a couple of weeks ago... I have not stayed at Summer BayResort... but I have stayed at the Villas of summer bay. These 2 share resort ammenities. I actually liked the Embassy pool area better than Summer Bay. Traffic was certainly less at Embassy. Summer bay is on 192 so it may be quicker to get to the AK. But Embassy would be quicker to Epcot. Staff at Embassy was great, friendly and the resort was clean, and well maintained.. same for Summer bay common areas. Sorry I can't be more of a help. Both are about equal in my book.