I also have a 375H&H and a 9.3X74R.
I love them both.
The 375 is made on a commercial 98 Mauser and the 9.3 is a Ruger #1.

I am on my 2nd barrel for my 375, but I have to admit I REALLY love my #1. It's shorter, lighter and kills very well.

I have had the 375 for 39 years. My #1 for only about 4.

But I could not say which one I like more at this point.