Is an open-cell wetsuit more or less buoyant than a similar standard neoprene scuba suit? I got a Hammerhead Adaptation 7mm skin-in suit for Christmas and I'm trying to figure-out how much weight I should start with. I'm 5'9", 161 lbs and normally use 17 lbs when wearing a one piece 7mm Pinnacle suit with a hooded vest. I was thinking of starting with 17 lbs on my new suit and adding/subtracting from there...does this sound right?