Superman well win. Even if Goku has magic in his, Superman has defeated guys with powerful magic, like Black Adam, Captain Marvel, even Thor in the Marvel/DC Crossovers. Superman is alot more stronger, he is more faster, and more durable. He has enough conbat training and experience to even the edge with Goku's martial arts training life style. Superman has a power up as well, where he can just go to the sun and dip inside it and come out flaming. You have heard how he is fast enough to reach the sun in under 3 seconds from Earth, and how he has wad capable of lifting a planet the size of Earth, and taking on the pressure of two worlds that were all extremely larger than Earth and were colliding, which were also embeded with magic. All those feats have been done without going to sun. The closer he is t o the sun he is more stronger. So Superman wins.