You know what a Rolex has that Ares and a cell phone doesn’t?
Heritage. For some that’s a worthy reason to part with a lot of money. Insofar as function goes I can think of multiple times where my cell phone didn’t work but my Speedmaster did. Like when my flight got delayed and I needed to know if I’d miss my connection. Jumping the hour on my X-33 as I stood in the aisle worked a lot better then my satellite powered smartphone with no signal.