Depends which climber it is. I own the Lone Wolf Alpha sit-n-climb, absolutely the quietest climber I ever tried or owned. It weighs approximately 18-19 lbs., but the way it folds flat and carries, it actually seems lighter than than the old 15 lb. Loggy Bayou I used to own. I guarantee that the traction belt is quieter than a cable or band.

As someone else said, a climber friendly tree is generally harder to find whereas trees suitable for strapping a stand on are easier to find. That is the only drawback to a climber.