What people consider their bushcraft/survival knives differs greatly.
My opinion is that a bushcraft knife is one you use in conjuction with an axe, khuk or machete, and maybe a sak/multitool, to do general wilderness stuff. Many people would also consider this their survival knife also.
Personally I feel a survial knife is a knife that can do all survival tasks- that is, primarily shelter building and firecraft- with no auxillary tools. I like to imagine that my backpack gets lost and all I am left with is what I am wearing, and I have to make do build shelter etc. with that. For that reason, I prefer wearing larger knives when camping. However, I am sure many, if not most, people here would disagree with me, which goes to show that this really is purely personal opinion. Just my two cents.
As for the nighthawk, I think I had one a couple of years ago, and it sucked. If you want a bushcraft knife, my recommendation would be a carbon frost's mora- very cheap and good quality, I have two.