Firefighter working under high stress situations and with gloves on? I'd opt for the umnumzaan with the hinderer designed lock bar stop. The 25 doesn't have this, so you would have to be real careful to not overextend the lockbar under stress.
Not an easy thing to do, but why take the chance? Also, the checkered pattern on the umnumzaan scales add more grip to the knife.
Shouldve mentioned this will be an edc knife off duty. I beat up the departments tools and my bm triage at work. Now should i go with the regular umnum or the wilson combat then? Mentioning being a ff was just letting you know i actually use my knives and dont hide them in cases
I edc a large Sebenza 25 in a slip sheath daily as I feel it gives me the benefits of both the umnumzaan and the sebenza in one package. I prefer the sebenza blade shape over the umnumzaan, as I feel it offers a little more point and a little less belly.
I have never owned the Startac umnumzaan so I can't speak to the feel in hand, but the 25 with the dual finger grooves feels secure in hand. My current umnumzaan is the old school pivot without the lockbar stop.
Appreciate what you do for a living. Good luck with your search. Please let us know what you decide. I think you will like either one - CRK knives are like potato chips - you can't stop at just one.