gosh, this is a hard one. i suggest looking into making a pros and cons chart for each resorts and do a price comparison. i would get really nervous about the price difference especially since excellence is more.
i'm a proponent of the "it's our wedding, do what you want" idea, but think of your guests at the same time. just be prepared to come up with the best reasons for resort switch so you won't get negative feedback.
good luck with this and tell us which resort you end up going with! =)