Don't get me wrong, I like the PRI 5 prong piece for tube type barrel nuts, since it give a 5 point contact to the nut holes over most two point designs, but just have found that the gear type wrench works great without leaving behind any marks/spine marring. Plus, since the gear type wrenches do not need a extra torque or break bar attached to them, quicker/more rigid to use to pull barrel nuts as well. As a mater of fact, once you have gotten to the point of knowing what 80lbs feel like so you don't go past it, don't need the torque wrench/breaker bar to install the barrel nut correctly as well(single tool instead of having to use two).
So, I'm not saying that you are wrong, but have found that I have yet to mar any barrel nut spines with a gear socket type wrench, and find it faster to use since it's just a single tool that I have to grab, and not dig out a torque wrench or breaker bar to use with it (come from the school of the KISS (keep it simply stupid) method).