Presta's main benefit is more about how the valve functions, in regards to getting pumped up to higher pressures. Because the stem of the valve needs pressure in the pump head to get high enough before it pushes the valve stem in, and start flowing air into the tire, when you try to get to 120 to 160 lbs of pressure it works better than a Schrader valve where the valve stem is depressed the whole time, back pressure can leak out.
Otherwise I would say tomato - tomahto. (potato - potaato?)