I have used both, like them both equally. The Sherwood is a little more rugged. The TUSA is a classic design that has been used with modifications for many years. Get whichever you like and take care of it.
As noted above anyone saying they would never let anyone dive with a TUSA is doing themselves a great disservice and are just plain ignorant. We used environmental sealed TUSAs in the Antarctic with no problems at all.
As noted above anyone saying they would never let anyone dive with a TUSA is doing themselves a great disservice and are just plain ignorant. We used environmental sealed TUSAs in the Antarctic with no problems at all.