Perhaps, but in our case, when we went three years ago Chevel Blanc was brand brand new and hence looked interesting, but alas we settled on como as I didn't want to pay 2x and wear a tux. Just my thought process, however misguided.
Should we return, it'll be soneva for us.
Without having done either COMO or Soneva (just going off the photos - and having done Six Senses), Soneva/Six Senses just feel too rustic to me whereas COMO seems to strike a nice balance between rustic and elegant elements.
Agree re: tux - despise the idea of wearing formal wear at a beach property.