9.3 drop at 300m is 22"
.375 drop at 300m is 17"

No doubt .375 is balistically superior - that 300fps difference is there - and those do drop less, make bigger wound chanell and penetrate deeper as long as bullet is up to its job - speed difference and atributes described come at price - recoil or weight and price of a rifle.

.375 has a jump start of app. 100yds - 9.3 does at point blank what .375 is doing at 100yds. Is there a difference? Sure is. Do you need it? Your call (I don't). At what cost? - Bigger recoil or heavier rifle that costs twice as much...