This is a discussion for those who don't know which model is which from the named list in the description.
-101st Commander has 2 extra horns on the top of his helmet different from the Captain and the Lieutenant. He also has a shoulder pauldron on his left side ana kama.
-101st Captain has the ammo sling around his chest with the shoulder pauldron on his left side and he has a kama.
-101st Lieutenant has a shoulder pauldron without the kama but still has the sling
-101st Spec Ops has the dark helmet all around
-101st trooper just looks like the Lieutenant but without the sling and the pauldron
-101st Medic has medic markins
-101st Sniper has a crosshair on his left pec.
-101st Recon has the recon helmet.