The ultimate result would be pretty much the same. He was stronger than current Koby but not enough to make a difference where it matters in that battlefield.
At most he would help save the ship from Pizarro but I know someone else other than Garp and Koby is going to do that so it's not really a necessity.
At most he would help save the ship from Pizarro but I know someone else other than Garp and Koby is going to do that so it's not really a necessity.