First of all, what people can lift/move =/= combat effectiveness. Seriously, this is the case in the series itself.
Like I said, think about the implications of Cell's Solar Kamehameha. It was enough to destroy the whole solar system. That means it's at least as powerful as a supernova. This is supported in the guide for Dragon Ball Online, where it says:
Keep in mind that Vegeta never got beyond SS2, where he was just a bit stronger than kid Gohan, who was on the same general level as Cell.Goku goes missing: realizing his death is imminent and wanting to settle their rivalry, Goku leaves the Earth with Vegeta for a final battle. Years later, supernova explosions are detected; they are assumed to be from Goku and Vegeta's battle.
Anyway, the Death Battle guys used a throw away line of dialogue from a movie that said that Superman can survive fifteen supernovas easy. If we take that throw-away line of dialogue to calculate his strength, the same thing should probably be done with Goku, rather than doing what they did- completely speculating by assigning their own unit to a number on an on object in the anime.
In the Buu Saga, Goku and Vegeta as Super Saiyan 2s both suprassed SS2 Gohan from the Cell Games. Super Saiyan 3 Goku is four times stronger than SS2 Goku. So he can dish out the equivalent of four supernovas, and I assume his durability is on par with his offensive power. This is the max he ever reached in Z, and he has no real impressive speed feats, so of course Superman would still tool Goku...
...but then we get into GT. We all know the infamous scene where Goku says that Rildo is stronger than Buu and proceeds to fight and win against Rildo in his base form. Since Buu (the true Buu) was on par with Goku as a SS3, that means that Goku got 400 times stronger in GT. So now he can dish out the equivalent of 1600 supernovas. Already way out of Superman's league.
Then the Baby Saga comes and things get beyond ridiculous. I'll quote what I said in the Buugetto thread:
and another postSuper Baby Vegeta 2 would probably stomp him. So would Syn Shenron. Actually, Baby Vegeta probably wouldn't even need to be super, considering he's somewhere far over Majin Buu x 400. That's assuming you can even kill Buu though... really I have no idea why that Spirit Bomb worked. The moment Super Buu regenerated from smoke after being blown up and having every single piece of his body disintegrated is the moment everyone should've just given up.
Actually, if Baby Vegeta's super modes work like regular Vegeta's super modes, then Super Saiyan 1 Baby Vegeta = far over Majin Buu x 400 (he beat down Super Saiyan 3 GT Goku, who had previously gotten a big power up, and said BEFORE that that the guy he fought evenly with in base was stronger than Majin Buu), Super Saiyan 2 Baby Vegeta = far over Majin Buu x 800, and Super Saiyan 3 (or whatever that last form before Golden Ape was) Baby Vegeta = far over Majin Buu x 3200. Even a fusion of Vegito and Gogeta from Z would get stomped.
If you want to make this even more of a spite thread, then Golden Great Ape Baby Vegeta would be the last Baby Vegeta x 10. Soooo max power Baby Vegeta = far over Majin Buu x 32,000.
So a Super Saiyan 4 is probably 100 times stronger than a Super Saiyan 3, cause SS4 Goku fought evenly with Golden Great Ape Baby. So... he can dish out the equivalent of 160,000 supernovas, and probably take a comparable amount. Superman would still be faster than him, but that wouldn't matter if he couldn't even hurt Goku. And that's before getting into the Kamehameha x10...Baby Vegeta (Golden Ape) should be around Majin Buu x 40,000 at the least, since like I said his first form (which would be Majin Buu x 500 here) was noticeably stronger than SS3 Goku, who's Majin Buu x 400.







