I've stayed at both and both were noisy AF! The all inclusive next door at Sonesta has loud microphones and speakers ALL DAY LONG from their pool area that bounces off the buildings and invades La Plage. Then at night the nightclub (We?) is so freaking LOUD! at La Terrasse.
Add to that we had garden room (LP) so no view unless we attempted to peak through the oleander could we see the water. The pool was busy as well.

IMO the pool and view at LT was much nicer. Also quiet during the day. Hubby loved the view of the airport and Maho/Sea. Depending upon what unit at LT it could be a bit quieter and away from We!

This is the LT pool and view (if I ever get my act together I will post the view from LP)