Bear in mind that at FS, in my opinion, you need to take a higher category villa, such as the renovated Premier ocean view villas, to have the best experience. At that point, FS is not really going to be any less expensive than Aman, and could even be more expensive if you are able to get a good rate at Amankila.

Why not have a TA who has experience with both properties look into the rates for your dates? Then, based on any confirmed upgrades or inclusions offered, you can more easily see which resort would be a better fit.

If you want more options, go with The Legian or Oberoi!