Board Thread:General Discussion/@comment-7503158-20170323074736/@comment-24922135-20170327120544

I mean, adding a narrative to the fights is more fan fiction than speculation. There is no saying the fight would go exactly one way or another.

Both Bens are called 'Ben' and have the hero name 'Ben 10'. Calling them OS Ben and Reboot Ben is the only way to tell them apart.

Even if Ghostfreak is useless against Upgrade, OS Ben still should know Upgrade's weaknesses from personally experience. Therefore, he can beat Upgrade with Heatblast.

Fights using Aliens from both series don't determine much since both Bens would know how to use and beat them.

That being said, OS Stinkfly's tail would probably win him the 1v1 against Reboot Stinkfly. As I said before, Reboot Grey Matter's use of pressure points would probably win him the fight against OS Grey Matter.