Actually, Herms translated the entry awhile ago for me for a debate I was having with someone on Reddit, and this is specifically what is stated.SSJ2FutureGohan wrote: So in other words, it can just mean
Potara Boost >= SS4 boost
and not necessarily SS Vegetto (Buu saga) >= SS4 Goku?
After Goku and Vegeta use a merging item to merge, they become Vegetto! They can furthermore become a Super Saiyan, making them Super Vegetto! After the two strongest people merge, they become the greatest master in the universe! Perhaps even stronger than Super Saiyan 4!
Given the wording, it seems far more likely it's a comparison of Super Vegetto to Super Saiya-jin 4, and not just a comparison of the Potara earrings' boost to Ssj4.
As for Bebi Vegeta's whole "mightiest" power line, remember that this is common main villain arrogance sort of talk, and even though Goku seemingly confirmed it with his line that it's higher than anything he's ever sensed before, he's made the same kind of statement before about an opponent, only to clearly show he was stronger than them the entire time (makes the statement about Fat Janemba in movie 12, before easily defeating later him as Ssj3). As such, he doesn't include himself in the mix when he makes such statements, and since he was Vegetto at the time, he wouldn't be comparing the strength he's sensing from Bebi Vegeta to that of Vegetto.




