My primary emergency firestarting tool is always going to be a Ferrocerium Rod. What most people are mistakenly referring to as a "flint and steel." Ferrocerium rods are also known as Metal Matches, for obvious reasons.
I don't consider Bics or Crickets or Zippos to be "cheating." As far as I'm concerned, when it comes to survival, if you're not cheating, you're not trying hard enough. What good is it to be the most "original" or "historically accurate" corpse dead from totally preventable hypothermia? Just doesn't make sense to me at all.
When you use real flint or other naturally occurring rocks to obtain sparks from certain high carbon steels, like you find on some, but not all, knives, those sparks are very small. Light and frail. It takes very good conditions and excellent tinder to make the most of them. Ferrocerium and Misch Metal Rods, on the other hand, have sparks that are incredibly hot. In the case of Misch Metal, you can actually throw molten gobs of burning metal into a prepared tinder pile.
The Bic or Cricket is preferable to the Zippo, to be sure, but I don't believe them to be superior to a Ferrocerium Rod. They are good to have for just more emergency life insurance though! Once you know what you are doing when it comes to fire construction and finding and preparing tinder, three quarters of the battle is won, anyway. If you can't do that, it doesn't really matter what you have to start a fire with. I have, literally, watched a frustrated man start cussing a fire instead of himself and go to bed after being unable to light a fire at a KOA and he was using charcoal lighter fluid.

I carry a 2-liter bottle preform with 50/50% sections of 100% pure cotton balls and #0000 Steel Wool for tinder and Ferrocerium Rods, a K & M Matchcase with REI Storm Proof Matches in it and then a Doan Magnesium Firestarter as well. All of this weighs nothing and takes up hardly any space whatsoever. It insures that I can start a fire in any environment I am likely to find myself in on this continent.
"Any sufficiently advanced technology is indistinguishable from magic." ~ Arthur C. Clarke's Third Law of Prediction