Just got my first inkosi over the weekend, a large tanto pj. A 25 was my first CRK and first real high end knife. Eventually i sold it toward the next thing and in general i have preferred the 21 since, the pivot bushing is really cool. I lost my first knife earlier this year, a sebenza and figured trying out an inkosi would be a good way to go.
I think i made a good choice, the refinement coming from the 25 is well done, i love the huge washers and how theyre supported on the stop pin. The lanyward slipped over the standoff is better, you can just slip it on and off. The blade is thick but tall and the hollow grind isnt as stout as the it seems for the 25. I really cant wait to compare it against a 21 just for edge geometry. The slight changes i read about from the 25 really add up to a knife that just feels better, refined.
Hopefully ill send this back to CRK for a custom graphic at some point.
Also i used to be more partial to the 21, so now when someone asks 21 or inkosi, im not nearly as sure. I suspect as a small the 21 is better, but ill have to try a small inkosi someday toknow for sure, or at least handle one.