This could be partly explained by the fact they use Sony’s own 5mm driver in their design – by comparison, the WF-C500 use a 5.8mm driver while the WF-1000XM4 boast a larger 6mm unit. So small in fact, that they make the more expensive WF-1000XM4 look like a couple of boulders by comparison and they also appear smaller than their cheaper siblings, the WF-C500. If you’re looking for a discreet pair of wireless earbuds that don't look or feel bulky, the Sonys could be for you. We found the WF-C700N (left) more comfortable than Sony's more premium WF-1000XM4 (right).
