All the cards have a code and a name, eg M62 Power Rifleman.
For some reason some of his iron cards are named differently?
M91 cobalt/gold/silver/bronze/lead are called Superb Rifleman, but the same card in iron is called Warlike Rifleman.
B61 in cobalt/silver/bronze/lead is called Power Rifleman, but in iron is called Improved Rifleman.