Study the relative handle thickness comparison in an early thread. The RC-4 is decidedly smaller - but comfortable. The thumb jimping on the RC-4 is parallel to the blade edge on the spine, while the Bravo 1 has an upward swept thumb jimping, which I am not so fond of. It's larger grip feels great to my CTS-problem medium+ hands.
I went a different route - to the Bravo 1's predecessor - the Gameskeeper. They still make it - and a longer version. See mine below in the cheapest handle they make - natural Micarta. Below is my Boone - ordered in beautiful bocote - too pretty to use. The rest of my small collection of Barkies are Micarta or G10 handled - literally, whichever one was least expensive. The Gameskeeper also comes with a nice leather sheath.
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The Gameskeeper is my favorite 'bushcraft' knife. I bought another great BRK&T knife - the North Star - and thought it might replace it. The Gameskeeper has a guard - the North Star's blade starts immediately at the handle - my cold and wet finger slipped while I was whittling on my deck one cold Feb day after it arrived. Fortunately, I've had a lot worse paper cuts. I love the safety of the finger guard on the Gameskeeper.
Now, my only experience thus far with RAT Cutlery has been with my fantastic RC-5 - what a bargain. Very well made - toothy Micarta for a great grip. Hefty - very well made - did I say it was a bargain? Mine came with the now gone Eagle Industries MOLLE contraption... I'm a leather sheath guy. I'd visit Derrick for either - his prices are great; service is even better. The RC-4 in a KSF/Sharpshooter leather sheath would be a great choice - he has them. I do love the convex edge of the Gameskeeper & RC-5, however. Either way, you won't be upset with your choice.
Stainz
Sweet-- I may pick one of those up for my first survival/fixed blade.