I happen to have a couple of the Buck 389 canoes and the 371 stockman, as well as a couple Buck 301 stockman, as well as some Rough Riders in the same patterns.
As for the 371 vs 301, I have not noticed any practical difference in edge holding or in ease of sharpening. I'm not sure if Buck uses the 420HC or 420J, but I do know that whatever the steel, it has a good heat treat.
The 371 is a touch stiffer to open than the 301, a 6, maybe 6 1/2 compared to the 5 of the 301. The 389 has about the same pull as the 371.
The Buck 389 and 371 are both a fine knife. They were all sharp out of the box.
They also have Buck's Forever Warranty.
The Rough Rider canoes and stockman are also a very good knife.
I want to point out that the Buck 371 Stockman is a three back spring design, so none of the blades are offset or krinked.
The Rough Rider stockman are a two back spring design. I don't have a Rough Rider stockman under 4 1/4 inches closed (I like large Stockman. The 301/371 are about as small as I'll go for that pattern) The Rough Rider Spey is slightly krinked, but not enough to really be noticable, when in use. None of the blades rub on my examples.
I can honestly say the Rough Riders are every bit as good in all ways as the Buck and Case knives I have, and at a significantly lower price point - especially between the Case CV canoe and Rough Rider canoe.
Based on my experience, you will not regret getting the offshore made Buck or the Rough Rider. They both make a daRn good EDC.