There actually shouldn't be any difference. The phone draws the current it's designed to draw (assuming the charger is capable of providing that much current), it won't draw more current if more is available. (I normally charge my phones, powerbanks and headsets with a 30 Amp bench supply, so I don't need 4 or 5 chargers plugged in. None of them draw more current than they so using the charger supplied with them.)