15 vs 18

So everyone loves those stupid windy builds that take your breath away. I’m not really aiming for that , I just want it as windy as I can with my options. So I’m rebuilding my blowthru so I have pretty much unlimited room. What will be more windy , 2 Skar EVL 18s @ 1250 rms , or 4 Skar SDR 15s @...