I heard that the Versamax is an 80-90%+ parts interchangeable "clone" of the Benelli M4. Having shot them side by side, are you saying that the "10-20%" of non-compatible parts are what makes the Remington version of the Benelli M4 that much less recoiling? Is it heavier or is it something internal that makes the difference?

I ALOMST dumped my "M4 fund" on the zombie green Versamax last year. ALMOST. Not that I'm into the zombie BS, but that green smoke was sexy.