If i had to choose between the two in a survival type situation (that is to say that I would want to be rescued and hopefully picked up in 1-5 days) then I would take a Leatherman, or a SAK, or even a Gerber tool over a khuk. Why, same tired reasons of energy conservation blah blah blah. That and I would have more options with more tools at hand. Improv would be easier. Heck, my Leatherman Surge has everything but a corkscrew, really. Perfect for fixing exisiting equipment, cutting fishing line, cleaning and dressing any game (if any), light sawing, splinter removal.
A good khuk in a survival situation, IMHO, would have to be a good all arounder. I'm thinking an 18" Siru or maybe even a WWII (your choice of length). Munk's Sher Attitude Razor looks very promising. Pair that slim package with a quality mulitool and you have quite the package. I'm looking forward to trying mine out in such a manner this coming spring if possible.
This all goes without saying, that I think a Sarge knife honed to a razor's edge would be all the tool I would need to get me by for a short stint in the woods for a day or two. Anything beyond that and it wouldn't really matter what kind of knife I had. My survial skills would probably run out long before my tool selection did.
Jake