Well, since in a survival situation, you generally don't have time to say "wait, let me go get a few things," you'll be stuck with what's in your pockets or in your car.
If I were outside right now and got myself lost and had to survive until daylight, I'd have a Benchmade 710 and a Victorinox Soldier. If I were in my car, I'd have a little better chance of having some more essential tools, or at least a few hundred feet of paracord and a fixed blade knife (Camillus pilot's knife) and some means of fire starting.
I don't make survival a point, but I always buy an EDC knife that I know can handle some abuse (there's that dreaded word... "oh god, I don't want to void the warranty on my Sebenza so I won't baton it through this log to build a fire, that would constitute abuse.") The 710's a nice knife, but if the poo hit the spiny thing, I wouldn't have a problem "abusing" it, and it could probably handle it.
I've managed to get myself lost in the woods when I was farther off the trail than I thought and lost track of time. I had to spend a night in the wilds. I had a Vic Climber and a Bic lighter on me. I did just fine.
Sorry, I just think these threads are kinda silly. Survival is important, but your choise of hardware isn't as important as your mental preparedness.