Without getting into a debate about muzzle energy, which I think can be deceptive, the relative difference between a factory 9.3x62 (285 grs/2,350 fps) and a factory .375 H&H ( 300 grs/2,550 fps) is 200 fps and 15 grs of lead. My 9.3 handloads run at 2,480, so the difference is essentially 70 fps and 15 grs. I doubt there are many game animals that will know the difference.
even the original 9.3x62 load data at 2150 fps was enough for buffalo,lion,leopard, hippo, rhino or elephant and worked great to bring back some bush meat on the table but of course what the paper said and was the real experience is doing are 2 different things in that case ...
interesting to read that someone put a limitation to get better result out of the 375 bullet to 2400 fps and that author is kevin robertson.