I have the ebony interior and two children (7 and 4). Yes, the ebony shows scuffs. They easily wipe up with just a damp cloth, but no sooner do I get it all wiped down, and the kids get in the car and it's scuffed again. I even notice it on my door, when at times my shoe will hit it. It's more of a dusty mark than a permanent scuff.
I do not think my kids are overly rough on the interior of my vehicle, but they are kids. I have put the seat guards on the backs of the front seats, as my youngest is in a car seat and likes to put his feet on the back of the seat in front of him. I am constantly reminding him that that is not where his feet belong, but at least I don't have to rewipe the seat every day. And I keep a dust rag in my glove box. Sometimes I pass it back to the kids and make a game out of them cleaning up their marks.
I LOVE the look of the ebony with the wood (prefer it much more than the other options), so I don't think I would change my choice if I did it again. And, just like my white kitchen cabinets, I figure my car will be cleaner because I will clean it more.
But if you are looking for an interior that does not show any everyday usage, ebony is not it.