The thing is, one of them is much better than than the other for survival and/or your emergency kit. Here’s which one…
Magnesium Fire Starter
Using a magnesium fire starter
The fire starter is made out of magnesium, which is a soft and flammable metal. It can be cut and shaved with a knife. It typically comes with a small steel hacksaw blade attached to facilitate scraping the magnesium as well as the striker-bar. A flint/striker-bar is embedded into one side of the magnesium block.
Using it is easy. You scrape off (shave off) some of the magnesium into a small pile of shavings with the hacksaw blade or with a knife, etc. Then you ignite the shavings by sparking the flint (using your knife, blade, etc.) towards and onto the pile. Don’t worry, the magnesium block won’t ignite – just the shavings.
Magnesium burns at a white-hot temperature of 5600 degrees Fahrenheit, is nearly impossible to extinguish, and should enable your tinder to burn even when everything is damp.
Swedish Fire Steel
A fire steel (like the popular swedish fire steel
Because of this, if you are making a fire, you will NEED to have dry tinder to light in order to get your fire burning.
In short summary, a fire steel is Okay for its intended purpose, but not so great for an emergency survival kit or is not best for a survival situation. A magnesium fire starter clearly is the better alternative for this…