I think it's more CVA bragging about the Bergara barrel than Bergara is. The Bergara stamping on the barrel for the Accura is probably what CVA asked for.
At any rate. If you had the Optima and Accura barrel in you hand. You would see no difference in their looks other than the Bergara stamping. All other marking are the same. Except for Accura/Optima stampings. If you looked at the bore. You'd see no difference. I'd be willing to bet they would measure the same. They both have the material they are made from, and it's the same.
If you shot them both. You see no difference. Both are very accurate.
I think we both agree the safety is the same.
So, if the difference is some extra polishing. (maybe) It doesn't seem to add any accuracy.
I'm buying an Optima, because I see no advantage in the Accura. As a matter of fact. I think the Optima stock is a better design.
This sort of reminds me of a TC Triumph and the Bone Collector. The Traditions Vortek, and the Vortek UL.
Companies need to make money, but I don't like paying for features I don't need.
If someone feels more comfortable with Bergara stamped on the barrel. Pay the extra money and be happy.