I have a premium and have been getting around 1.5 moa with it. I have heard more reports of people getting 1 moa with CHF barrels than I have with premium barrels.
I would recommend if you plan on using a medium power optic and shooting ammunition that is capable of high accuracy, you dig deeper and see if you see a trend. If not, you are good with either barrel, as they will both out shoot the shooter.