Over the summer we had a pool installed with an Endless Pool swim unit. My goal is to use it as much as possible in each season, but since it is a full size backyard pool, and not a typical 5'x10' Endless Pool, we can't heat it year around. Yesterday the temp dipped to below 70, so I decided to dig out my sleeveless wetsuit. Amazing how much warmth a wetsuit provides, but I wonder how much more I can get with a full suit with sleeves.
I've looked at the manufacturer information for Blue Seventy, 2xu, Quintana Roo, and Xterra, but I did not see anything that led me to believe one model or brand held in warmth more than another.
My guess is that they are all pretty equal, but I thought I'd check with the experts here first. If a group of people around the world doing cold open water swimming doesn't know about warm wetsuits, I don't know who would.