Superman peaks his lift around 100 tons
100 tons = 100,000 kg = 220,462.262 lbs
An average person can lift 40% of their weight
An average person weighs 80kg, 40% of that is 32kg
100,000/32 = 3125, meaning superman can lift 3125 times the average man
Now, remember when Raditz scanned a human and his power level was 5?
Well, Superman's PL is 3125x5, which is 15625
Goku, when training with Kai, reached 16000PL using kaioken2x
When using kaioken4x, he reached around 40k
Goku wins. Science proves it.
(P.S. - Don't comment if you don't know who Goku and Superman are)