Superman Vs. Vegetto

[Joza]

"i never understood how superman was more powerful. Since the beginning they were moving so fast gohan could not see them."

Well that's the thing, combat speed and travel speed are very different.

Roshi was that fast he could catch bullets from a machine guy fired from a few feet away and could do a series of complicated moves in mid air faster than the eye could see.

Yet when he watched Goku fought Tien Goku moved so far that Roshi couldn't even see him move. Tien however could.

In the Piccolo saga Goku recieved a power up to the point that he know could move faster than even Tien could see and wasn't being series.

In the 23rd Budokai Tien said Goku's speed hadn't changed and prepared to out manouver Goku. However once Goku took off his weights he moved that fast he was able to remove Tiens belt without him even noticing.

Goku then couldn't see Raditz when he attacked them from behind even when he started off infront.

Later Goku got faster and learn Kaioken which he was able to multiply his speed further.

Then he was able to multiple his speed by 20 during his fight with Frieza and so on.