I did have a Maine Coon many years ago and he was huge,weighing in at almost 22lb's.
I think QMC is right,your 2 kitties are stunning and the tabby almost looks like mine,but I believe her weight indicates she's not a Maine Coon,or a NFC.
But they certainly are beautiful,especially the Tabby-girl.
"The cruelest animal is the Human animal"
3 kitties,Rocky(r.i.p my boy),Chico,Vinnie