I bought a thumbhole Omega that was 3X the cost of my old Traditions because A) the ignition on the Traditions was becoming unreliable, and B) I expected much higher quality and had the cash to go for it. The Omega and Encore have the same barrel from the same supplier.
Well, the overall quality of the gun is better. The out-of-the-box accuracy was better, though after 200+ rounds through both guns they arrived at about equal accuracy.
The big difference is the Traditions would shoot almost anything...to date, the Omega will only shoot 2 bullets (200 and 250 gr Shockwaves) with MOA accuracy. A couple more are in the 1.5" range. The 195gr DC which shot supremely in the Traditions shoot 4" or worse in the Omega at all powder charges, 70-135 gr 777 tried.
Bottom line, each gun is different...even those of the same model. I can hit 3" balloons at 500 yards with a .308 so I don't think it's me blowing 100 yard groups with my Omega, especially since I have found a couple consistent MOA loads and shot 6" groups with them at 400 yards. It appears, from with I have seen, that the barrels on the Omega and Encore can be very, very finicky. I know more than half a dozen people who have had problems. Patient ones, like Vapour, eventually find a sub-MOA load because the barrels are high-quality just finicky. However I still dislike having spent so much on a gun that only likes 1 or 2 bullets. I am very happy for you that the ones you have had are relatively problem-free, but I can assure you this is not our imagination.