Merc exterior looks more cleaner than the new X6. The new X6 proportions look odd and the profile is weird, compared to the old one and alot of the detailing is awful on the X6, appears like afterthoughts. The interior on the X6 is stunning, GLE is terrible, looks like something you find in an American SUV.
That said its pretty clear Merc copied the old X6 exterior design. In general BMW and Merc have lost direction with the styling of their SUVs, X5 and ML look terrible, the new Q7 also looks awful, looks more like a wagon.
The Range Rover Sport and Cayenne are too awesome, killing the X5, ML, X6, Q7 brigade.