First, ignore the reviews on tripadvisor - they are consumer written meaning that anyone who wants to complain has a forum to do so. If you want a more reliable review, (a) look for someone here who has recently been married there or ( check someplace like www.frommers.com; conde nast, or another large organization that isn't there just to lambaste your hotel just because their room service took 3 minutes longer to arrive than they were promised.
Now, if the price differential is really what's driving your decision, then maybe it is something to consider.
There's nothing wrong with moving your hotel, especially if you haven't sent out your STDs, and no one has booked.
I wish I could give you insight into either resort, but I haven't been to either. Good luck!!