Very doubtfu honestlyl. Goku wasnt even at full power even when both beyond 100%. Gokus power showed no signs of straining at that level so its reasonable to assume he could keep going.
Also Beerus had been dreaming about this fight.
I expect to see a major correction tomorrow regarding SSR and blue. I predict SSR will be > Blue, and clearly shown to be.
Toyotaro is the mangaka. The whole "fighting with God form, then switching to Blue at the moment of attack" strategy was something Goku touched on during the U6 tournament, and Vegeta perfected against Goku Black in the manga.
Honestly, Super's transformation system is basically the same as EoZ's.
Base = Base (no surprises there)
SSJ = SSJ (no surprises there)
SSJ2 = ASSJ (irrelevant transformation)
SSJ3 = USSJ (stronger irrelevant transformation)
SSJG = SSJ2 (special transformation that was hyped to hell at first then became standard)
SSJB = SSJ3 (strongest transformation but with severe power drain)
Nothing's changed at all, despite everything. "Limit Breaker" will probably be just like Mystic/Ultimate in practice, too.
Except ever since BoG, SSG hasn't even been that much stronger than SSJ1. SSJ1 Goku was around the same power level as 10% Blue Vegeta during the Universe 6 tournament. Going by your multipliers, SSJ3 would be almost as strong as Blue in that case...
Never let anyone else define you. Don't be a jerk just to be a jerk, but if you are expressing your true inner feelings and beliefs, or at least trying to express that inner child, and everyone gets pissed off about it, never NEVER apologize for it. Let them think what they want, let them define you in their narrow little minds while they suppress every last piece of them just to keep a friend that never liked them for themselves in the first place.
The OP's logic is sound on paper, but what he's forgetting is that this show is simply badly written and that stuff simply happens without rhyme or reason for the sake of the plot. SSB > SSG is one such example. We're told one form is stronger than the other, so we have to accept it. We're also told that Beerus wasn't even trying in his fight with Goku and that the 70% figure is BS, so we have to accept that too.