regulators scubapro ba 156 108

One of my BA I noticed the lever catching in the barrel square holes, I tried the curly lever but no help. Next I did a little filing, (suggested by one of the SB experts) tested and Shazam no more lever catches. Was thinking the G260, and Atomic have lever sleeves for low friction lever action...

Just don’t see the difference between balanced and unbalanced between these two regulators, supply pressure 1100 psi. Are balanced regulators all what the manufactures say they are cracked up to be. No pun intended. Lol What I’m I missing? Average flow (SP spec’s) is not that much different...