To me a survival knife is a tough as hell knife that isn't too big to have with you when the 'SHTF'. Now in my world that means the S6!

I like my DFCG but I'd seldom carry it because of it's weight. I'd carry a couple of knives in serious country so that be my S6, CS Kukri machete (or if I was in open deciduous country the DFCG possibly. But in less wild areas my SS4 or Bravo 1 instead of either big knife), my CRKT Dogfish and a couple of tools normally a Gerber Legend and a locking SAK Rucksack model..