So the concensus is they are all made of basically the same stuff, but different brands do behave differently. The one you prefer seems to be a matter of taste. Some folks love the Going-Gear steels which are remarkable for producing a little molten ball that stays glowing for several seconds while others hate this type as the striking technique requires more vigorous striking which compromises aim and requires a sharper striker.
Then there is the Light My Fire type performers that will produce sparks with very light strikes. You can use the edge of your blade on these without really dulling it and they produce sparks with many different types of strikers. I even produced sparks on my LMF rod with a piece of freshwater mussel shell! With these rods, you can strike the very bottom of the rod, last 1/4" at the tip and produce sparks which conserves the rod for a very long time. Finally, you can hunker down real close to your fragile tinder and aim your sparks more accurately to light it. The compromise here is the sparks are almost instantaneous and run colder and will not light as great a variety of tinders as the Going Gear types Rods will.
The third type is the cheap ass knock off type that sucks at throwing sparks. These things come under a variety of names, usually made in China and purchased at a sporting good store. Sometimes they work pretty good and sometimes they just suck, in the latter case best to just throw it out.
Finally there are the Doan Sticks with a little ferro rod attached to a mag bar. You can shave the mag bar into curls and then light that as tinder, or just use the ferro rod to light suitable tinder like any other firesteel. The DOAN sticks I've used were bought under the Coglan's brand, are cheap (about $5.50) and the ferro rod seems to throw sparks similar to the Light my fire type. I actually prefer the doan sticks myself. While the small rod will not last as long and also has been known to fall off with the glue unsticking on them, I find the black really easy to grip while striking.
I carry a LMF, a knock off Army sized one that throws similar to a LMF and a couple of DOAN bars in different kits I have.