You can always add spacers in beneath the seats. I have seen this done (most likely by the dealer) where washers were added in between the seat tracks and the floor to lift the seat. The other nice thing about the Mustang seats is the options for the upholstery is pretty wide including a modified stock look with added lat bolsters.The "only" thing wrong with the stang seats are they are way to low in the bottom seat area.
If you were to sit one side by side you'd see the big difference. I have the patience of Jobe & my bench seat is in great shape so I'm sure, eventually, I run across a decent set.