I own both and prefer the Kanger. I have converted several KPT 1s and 2s with the airflow base, and it makes a huge improvement. I have only heard of one instance of someone drilling out an Aero but who knows why, they have great airflow, and infinite adjustment factor, where the Nautilus only has four options and it does not lock, but clicks in place, three of the four air holes are too small and one is too large, so I could never find a sweet spot. Tank is a monstrosity at 5 ml, and breaks easy, I get a dozen calls a week for replacement tanks. Coils are more expensive than Kangers, nautilus mouthpiece is small and wobbly. Aero tank has been redesigned from the KTP2 with a flat top, brushed chrome instead of polished, and fit and finish is top notch with a well fitting mouthpiece.