In general the 375 Ruger seems to have an edge in performanceovermost 375 H&H production ammo, but when I look at the best available production ammo there are 375 H&H rounds that generate 5,000 lbs KE.I do not see numbers that high from any of the 375 Ruger ammo. It may well be out there and I could be mistaken I just did not come across any in brief internet search.

It seems in this post that it is assumed that the Ruger has superior performance. I just wanted to mention that the high end H&H ammo is every bit the match "if not superior" tothe Ruger