The Omnitrix could also copy Goku's DNA and give Ben a new Saiyan form that would be in the peak physical condition a Saiyan of Ben's age could be, coupled with an intuitive understanding of every ability inherent to the Saiyan race and he would whoop Goku's ass at his own game. Then when Ben learns of Ki through this form and how it is innate to all living things, then every form of his is getting buffed with Ki.
I’m gonna be completely honest this is facts Ben 10 can indeed defeat Goku but Goku is still a great character obviously but Ben 10 does indeed win against Goku.
