It would really depend upon whether you walked off the edge of a boat after your gear was put on by a crew member; your fins handed to you; and, well, you just floated your bloat for a while in warm water -- versus hiking in and out as we did as kids with a couple of tanks, and still do on occasion, in the Big Sur Coast area, following lengthy switch-back trails, down to secluded beaches and dealing with strong currents, for a couple of hours, often in 10˚C water, if not colder.
Then there's the hike back . . .
Then there's the hike back . . .