So what does Bowen do well that Huntington does not or vice-versa?
Personally, I've never used Huntington.
But I've had handguns built & customized by Hamilton Bowen, David Clemments, & Gary Reeder. Out of those 3 gunsmiths, I'd rate Bowen #1, Clements #2, and Reeder #3 from my personal experience.