My Marans are Fowl Play: Are They Secretly Australorps?

(Not talking about my Barred Rock 'Boss')

Ive gotten a couple copper marans a few months ago as babies and I've noticed that they dont look like the traditional maran. Not super new to this, but I am rather new to naming the actual breeds.

They are all happy and like coming up to me but I swear they kinda look more like Australorps (even though one hen has feathery feet and such)

The one in the picture is the one that looks the least like a Maran. So did I potentially get a mix up or can Copper Marans look different?

To me it doesnt matter what breed they are though as I love them to death and they trust me.