Could probably be a real good fight giving Volstagg weapons capable of hurting Ben. I think Ben has to much Str in the end though. I just dont know how long the "Lion of Asgard" can keep his wind, LOL.
Well I wonder how long he been a Warrior he may have experience over Ben and to make it more sporting Volstagg is in his prime better fight faster and stronger then the other members of his team.
I think that Ben is stronger, but Volstag has way more endurance being an Asgardian and all. If the Thing can't finish this before the muscle fatigues build up in the half hour or less that it would take for that to occur, Volstag would take him apart. I'm assuming that this is a H2H contest, and not with weapons though.
Vastly inferior to the real deal. The only notable attempt of quantifying Ragnarok, iirc, was done in a Civil War What If in which the clone was pegged at being around 1/3 the real Thor's power as anything more than that was potentially hazardous to the planet.
Personally, I think that's a fair assessment based on what Ragnarok accomplished during Civil War and Siege.