Vegetto Ssj 1 vs. Goku Ssjb

Battle of Gods flat out states that Super Vegito would be no match for Beerus, as to which SSJ God and SSJ Blue are currently known to hold their own against Beerus. This is all derived from the quote Goku has after being curbstomped by Beerus, first considering if fusion would work, but then commenting that, no, not even fusing would work against Beerus. The only known fusion strength that Goku knows and has experienced, would be Vegito and Super Vegito, so there's really no second guessing there.

Also, as of the recent chapter of the Super Manga has shown (chapter 23), Shin directly states that SSJB Vegito may well be stronger than Beerus, which is another indication that Super Vegito from the Buu Saga, would not have been any match for Beerus, which further indicates that SSJB Goku and SSJB Vegeta are stronger than SSJ Vegito.

And the multiplier for SSJ3 is 400x base, and while Goku never directly said that fusion would multiply (least, not as far as I can recall), the Super Exciting Guide did mention that the Potara fusion was X's powerlevel times Y's powerlevel, for Vegito these would be Goku and Vegeta's base power levels as that was how they were before fusing. Though, it is safe to say that this multiplier has since been retconned, like several other things about Potara fusion.

Well it's not so much that SSJ Blue Goku can beat Beerus, but more of the fact that he stands a higher chance of matching up against Beerus, something that none of the other SSJ forms have been able too. Not SSJ3 Goku, nor SSJ2 Vegeta, who had surpassed SSJ3 Goku in terms of power.

While it is true that SSJ Blue Goku did not defeat Beerus, he does stand a higher chance to match up against Beerus, this was already proven when Beerus was using about 70% of his power against SSJ God Goku, and we know SSJ Blue Goku is stronger than SSJ God Goku. While Beerus his strength has been....iffy in Super, it's still a point that SSJ God and SSJ Blue are a match, and even a challenge for Beerus.

And I wouldn't discount what Goku says about Fusion, he knows Vegito's strength, he knows how great it is when Vegito went SSJ, if he says that Fusion would not be enough to even stand a change against Beerus, then there is no reason to not believe that. Goku is the one, after all, who tends to keep this chart in his head of people's strengths and abilities, it be unlikely that he wouldn't accurately guess Super Vegito's strength against that of Beerus.

The series never gave us an accurate statement on how fusion multiplies power levels, only that they become so much more stronger. And though the guide did mention X's power level times Y's power level....in all honesty, this seems to be just a quickly made up thing. Considering that, if this had really been the case, then Vegito would never even needed to have gone Super Saiyan, his base form would have been more than enough. Personally I never placed much faith in the whole "X times Y" thing for Potara Fusion, but that is personal bias. Currently, all the information given from Super, would indicated that SSJ Blue > Super Vegito, purely on the fact alone that SSJ Blue can match up with Beerus, which was something Goku said that Vegito would not be able to.

As for how Salagir does it.....I don't know honestly, though I would not be too surprised considering DBM's Vegito is borderline Gary Stu.

I would honestly think this should be a closer fight, but that mostly because I really think SSB should be a weaker form than SSG. Goku was able to force Beerus to use 70% of his power. It makes no sense at all to have Beerus be stronger without training and SSB being made the stronger transformation. To me SSB Goku should be inferior to SSG Goku and by that virtue SS1 Vegetto should have a better chance of fighting him than SSG Goku. Having said that I think SSB Goku would still being stronger than Vegetto at SS1. Vegetto would have to go SS2 or SS3 have a shot at winning.

Super upped the power scale, so we have to accept God forms far outstrip Vegetto and Buu in DBZ. Goku would win no problem.

My Super upping the power scale statement was my way of acknowledging this. I should have been clearer with that. I'm not really disputing that Super didn't change that from BoG. My post was more arguing that I think SSB should be weaker than SSG to explain the huge power gap between the Saiyans and Beerus now over Beerus being retcon to not having used 70% of his power and constantly being stronger just because he is a god. I find that unsatisfactory. To me there is no benefit to having SSB being a stronger form than SSG. It would make more sense to have SSG (temporary power level) match to 70% of Beerus power than have Goku and Vegeta reaching a higher power than SSG than retcon Beerus was really way stronger than he said he was and let's pretend it didn't happen.

That's why I used should a lot in my post rather than would. 

I honestly checked out of the anime a few episodes into Super because it took too long. I'm not even sure I got into the SSG Goku vs Beerus fight. It's not the worst retcon. I just disliked it, because I frankly felt there were better ways to have Beerus stay on top. I think that is just me. Most people seem fine with Beerus just being stronger without training. It is probably because I'm not as big of a fan of his. He was cool in BoG, but to me is just as bad as Vegetto in DBM and the Kai in canon except Toriyama rewards his laziness by having him be successful in spite of it lol.

To me he is what Supreme Kai is to you, except plot is on his side for a change. 

Blue. Goku knew Vegeto wouldn't be any match for Beerus, yet SSG was capable of going toe to toe with him. Presumably, Vegeto could go SSJ3, and Goku knew that.