Welcome to our forum.
well put ndabunkai sell both styles. i do prefer full foam but that is me . both spas do the same thing they heat water. they move water. they are enjoyable. i believe it is just a personal preference on what each person choices. there are arguments for both sides, that will never end. over time any spa is going to have a leak. but each dealer can handle it different in helping the consumer repair it. so it does not have to be negative issue on the spa.
over time any spa is going to have a leak.