Like I’d care what the source of 7.62x39 coming my way was.
You might. SKS has fixed magazine with 10 round capacity. He's got to reload after 10 rounds. Gives you an opportunity, to move to cover, better concealment, or take him out.
AK OTOH typically has 30 round removable magazine, although other sizes are of course available. Makes for faster reloading, although not much if you've got loaded stripper clips for the SKS.
Exactly. :-)