My point was that, together, Camaro and Challenger had 0% of the "pony car market" in 2008 and in 2013 had about 65% of the "pony car" market.
That's kinda where I was going too in my last post.
Both have worked hard to build a car with great technology, high performance and, in many people's view, image/looks. Ford responding with a "cousin" of the Fusion, and a close member of the "Ford Family," doesn't seem like a move to "distinguish" the "Mustang brand." Only time will tell.
I understand what you're saying but I think that family resemblance thing is only going to continue to become more common.