I don't think the Beyonder would necessarily be more powerful than the TOAA, even though Beyonder is millions of times more than the multi-verse. Sure, Beyonder may oversee or occupy more territory than TOAA....but, how does that make him stronger?. I kind of look at it like European nobility. Beyonder may be a Duke, owning vast property. TOAA, compared to Beyonder, may just be a lowly viscount....the lowest rank of hereditary nobility. Sure, the Duke may own more property, control a larger army, and have more political influence....but, that is the end of the differences between the two. Physically, they both may be equals.
The U.S. President has more influence than the leader of the Sudan. The president may not have as much individual power as the Sudanese president...but, the U.S. president's decisions and influence are well above the Sudanese leader's.
I guess what I'm trying to say with those examples...lol..is that they would both probably stalemate in a physical fight. Beyonder may own more territory..and have more omniversal influence...but, it doesn't mean he would be physically superior to the TOAA.