I don't think you understood my first sentence though. I'll expand. The only gain on 2011-2014 vehicles is the same as if you upgrade any bushings from rubber to urethane. You're eliminating the looseness of the rubber spherical bushing in favor of a urethane spherical bushing.
I completely understand that. I know the new arm is just shiney and convenient.
I want to know how much of a difference one feels when upgrading from the OEM spherical (surrounded by rubber) vs this spherical surrounded by poly.
Some poly upgrades are hardly noticeable, some are very noticeable.