Especially in most OP doctrine - the mighty Defensive Tactics.
MG-42 with Incendiary Armor Piercing Rounds (non doctrinal, 240)
damage - 8
penetration - 19.8/16.2/12.6
DShK with AP rounds (doctrinal*2, 300)
damage - 10
penetration - 13.5/9/4.5
You should also add burst length and how many bullets per burst are being shot.
There is a reason why AP rounds MG42 melts light armor and AP rounds DSHK struggles with cache.