I haven't had the Viper but I've had the Ol Man and I have a Summit Broadhead now and I can say that the Ol Man was the quietest climber that I've ever had. I've literally looked up and seen deer within 60 yards of me as I was coming down the tree using that stand. The Ol Man was more comfortable than my Broadhead is. The Ol Man isn't the lightest climber in the world though. It isn't the smallest either. Iprefer the Broadhead over the Ol Man by a narrow margin.