A cur dog is none of these things, and all of these things, but to argue that curs as a whole are better duck dogs than Labradors is as pointless and futile as arguing that curs are better "finder holders" than the dogs who've been designed for that
What I meant to add to that is that what makes a better "hog dog" is dependent on what you are looking for a "hog dog" to be.
If you want to find a big boar hog, but you pay no attention to the hogs habits, you honestly don't know where hogs go, what they do, when they run, when they sleep, only that you see a track right here and you want a dog to smell it from right here and eventually find the hog and once it does, you don't care how long the dog needs to chase it, you just know you eventually want to catch it, then STOP insisting that curs as a whole are the dogs for you! You are in need of a hound even if you don't know it and if you breed curs long enough, your curs will eventually be hounds anyway. I.E.; Plott hound history.
If you know there are hogs where you live because you see them all the time, and you could easily shoot them but you really would rather catch one or even several of them with a few dogs each trip, then running straight up catching dogs is probably going to work just fine for you, no need to reinvent the wheel, just use dogs already made for that or you'll end up breeding curs away from all their other traits and watering them down to simple sight casting or short winding running Catchdogs. Why? Those already exist.
If you want a hog dog to absolutely hate a hog with every fiber of its being that he will lose his ever loving mind once he catches up to a hog and bay so madly that he pays no attention to what's happening around him you will easily accomplish this goal and you will routinely have to put your dog on a leash after every hog and drag them away from a caught hog, load them up and drive them away until they calm down and forget about that one that's tied so that you can go back to hunting.
Once you see the type of curs BigO and several other have produced doing the job they were created for, in the hands of a man who knows how to use them right, you'll understand why there's no better all around hog or stock dog. Seeing subpar "curs" in the hands of every Tom, Dick and Harry with a dog box, it's understandable why you've decided Finder Holders are "where it's at" and honestly, if I'd never known real Cur Dogmen, I'd probably be right there with ya.
Hope you all are having a great Sunday, blessings to all.