There are several different variants of each one, so it depends. The CVA V2 LR rifles all have longer barrels than the regular Accura V2 (27" vs 30"). So, you'll have a longer sight radius and probably a little bit more velocity depending on the exact load you use.
The Accura V2 LR is available in .45 and .50 caliber variants. The .45 caliber model is especially interesting because it has a faster 1:22" rifling twist rate (compared to 1:28"). That's the same rifling twist rate as the CVA Paramount and you can use the new Powerbelt ELR bullets in the .45 caliber Accura V2 LR.
With all that in mind, I'd say the .50 caliber V2 LR offers a modest improvement in performance over the regular Accura V2. However, it's a much bigger difference when you're talking about the .45 caliber V2 LR since it can use those new, really aerodynamic bullets.
