Suggested by Destroyer Sin Eater has a gun so you don’t want to underestimate him. That being said, I still see Vakishim winning this round because that Kaiju is bullet proof. He’s definitely not worried about getting shot with a random gun. That’s just not happening and so Sin Eater has no real options to defend himself here. Vakishim can just walk up and punch the living daylights out of him. That would be game set and match. Sin Eater would need a massive power up to tip the scales here. Vakishim wins.