In the six years I was an EMT I never needed a knife. Whatever I needed cut I could cut with my EMT shears. As a volunteer FF I have needed a knife just once in 22 years. It doesn't really matter what blade you have. Purchase the best one you can afford to loose on a chaotic scene and not have a heart attack when you do loose it. I do recommend a sheeps foot blade though.
In contrast, I've used a knife a few times (9 years in EMS). But honestly, whatever knife you want. I was using some CRKT Swat or something cheap.
I have the Hinderer - BIG knife. Too big IMO. I also have the Smith and wesson 1st response (440c steel), used the window punch once or twice. But really, for the money, you might as well buy a knife that you'll actually use. Something that you can carry off duty. The blade shapes on both aren't really good for cutting most things.