User blog comment:Kapanol/Grey Knights/@comment-25451195-20140927061206

mhmm... Define Marine, as an Imperial Custode is considered to still be a form of Astartes, and in a one on one fight, trample a Grey knight.

Dont take this the wrong way, I think Grey knights are awesome, but in some scenarios id rather take a platoon of Guardsmen over a single Astartes... Right Weapon at the right place and time.