Depends which version of superman.
Gohan is stronger if goku is in his normal form but if they are both in super saiyan 2 form or if Goku is in super saiyan form then goku is stronger.
yes he could kill him easliy
Well goku is the ultimate super sain so goku is stronger
Yes, he is stronger. But not when Goku is Super Saiyan 3 or 4.
Goku would win because he has super strength. And Goku is stronger.
super buu wins
Yes each super saiyan stage is stronger than the previous for example super saiyan 2 goku is stronger than super saiyan goku although the second stage is slower than the first stage power wise it's an improvement super siayan 3 is stronger than 2 and faster as well super saiyan 4 goku is the fastest super saiyan form (of goku only not counting fusion with vegeta) and is the last duper saiyan stage goku reaches.
goku, goten never goes super sayian 4
Gohan is way stronger. he defeated cell when he was a child and goku couldn't as an adult. after losing to cell Goku even admits that Gohan is stronger than he is. it is not about who can turn into level 2 or 3 super saiyan it is about who is the strongest. that's what the ? asks. Who is stronger. in this category Gohan clearly wins.
for one there is no such thing as ssj3 vegeta but if he did he will totally be stronger than goku
super goku becase he can unleash the sprit bomb final flaash would not work against it
The answer is........................................... simply no. Goku knows Super Saiyan 1,2,3, and 4, and Bardock never knew any of those.