Power and size of the explosion in DB are not linear, I mean that because Vegeta just make a crater when he was Trying to Kill Buu, does not mean that is the same power when Nappa attack a city, In DB, the attack of someone with low level, is less powerful that someone with high level, even if both desintegrate only a mountain, is explain by Vegeta to Android 18 that the attacks are all control, is also show by Freeza that he could cut the planet Namek, and survive a planet explosion with his body cut in half, however Trunks desintegrate him, same Trunks could not Damage the android even if do the biggest Ki attack and destroy the planet, but when he come back after the defeat of Cell, his blast desintegrate the androids and Cell first form, and no planet was destroy, but that does not mean the attacks are weaker.
Superman soporters go on and on in the attacks size and craters, in the Manga, of what i understand and what my opinion is about it, is that Toriyama mean for them to increase in power regardless the size, like when human torch from the fantastic 4 go Nova only in his Radio, not actually destruying the planet with a giant Nova, DB attacks have the power, in his radio of destruction. But is convenient to say they only make a crater by superman soporters.
I agree with Destiny guy, if Goku lose is due his lack of feats, and I disagree that in a crossover will have to equalise both, and because Goku history is finish, the crossover is with Goku going to train with Ubb, the Goku SSJ 3 of Buu Saga, when Dead will rival Superman(IMO) but when alive will lose when he run out of power(as he did against the kid Buu). the Goku of the End of the manga after 10 years of training will have at least the same control of the Dead Goku