D600 vs D700

It seems like some folks here are disappointed that the D600 wasn't introduced at a lower price, and the D700 is a great camera - but assuming the IQ on the D600 turns out to be excellent (which I bet it will), why would users select a D700 over a D600?

Again, no knocks on the D700 - it has earned a well respected place in Nikon's history but when you look at the price and features and specs the D600 looks pretty sweet overall and very competitive vs. the D700. Even at the same price what would cause a user to take a D700 over a D600?