Board Thread:General Discussion/@comment-25709620-20141118012216/@comment-1352718-20141118024250

Ben 10,000 is an iteration/the canon future of OV Ben Prime. He can create hybrids of his aliens and also still has access to his non-hybrid aliens. If the episode "Ben 10,000" showed people anything, it's that Ben 10K, if completely serious, can defeat people within moments or minutes.

Ben Prime has yet to take things seriously (He did in UAF for a majority of the time) and when Ben Prime is serious (as in UAF), he's shown to be unforgiving as well (against Forever Knights, Vulkanus, and Kevin), wanting to end the fight quickly.

I'd probably lean towards Ben 10,000 if he was evil as he has no reason to hold back and mastered most of his Omnitrix/Biomnitrix. Ben Prime (as of OV) is arrogant and always underestimates his opponents.