Nuova Shenron is one of the only shadow dragons who was able to fight with Goku’s Super Saiyan 4 form! That’s pretty impressive, of course Goku has more experience on his side of the table. He’s also got more tricks up his sleeve. Plus he has the extremely powerful Gogeta Super Saiyan 4 up his sleeve! Nuova Shenron may be fast and powerful, but Goku is faster and more powerful. Goku wins.