Sung Jin - woo in Solo Leveling has the ability to level up, which significantly increases his stats and powers. He can also summon shadow soldiers, which is a very unique and powerful ability. As for Goto from the novel, since we don't know which novel he is from specifically, we can't really compare directly. But if Goto doesn't have the ability to create minions or rapidly increase his power like Sung Jin - woo, that would be a major difference.
Well, Sung Jin - woo from Solo Leveling has some remarkable abilities. His shadow soldiers give him an edge in combat as he can use them for various strategies. They can act as decoys, attackers, or defenders. On the other hand, we don't know much about Goto from the novel. If Goto is a normal human - like character without any extraordinary powers, then Sung Jin - woo would definitely win. But if Goto has some unique powers like mind control or teleportation, the fight could be more evenly matched. However, considering Sung Jin - woo's experience and growth throughout Solo Leveling, he still has a good chance of coming out on top.
Solo Leveling is definitely a manhwa. Manhwa have their own style and fan base. Solo Leveling stands out among them with its fantasy elements and exciting adventures that have attracted readers worldwide.