It started its life as part of this set but I picked this one up for $3 at a thrift store a long time ago. I tore out plastic window and went to work on it with a sharpie and a dremel tool...
In my opinion there is very little if any difference. Primitive skills may be a catch all phrasing that encompasses both terms.
Example. If you learn flint napping you can make a knife in a "survival" situation (but its better to carry a good knife)
Sorry for my absence. My divorce drags on... I put this together on Saturday from a stainless steel kitchen canister and I figured id share and waste 5 minutes of your time, lol