Being able to see a B&W image from the sensors is a great advantage when you are flying side to side, up/down. or backwards. The 70mm lens gives you some great parallex. I don't think I'll ever fly my Air 2s again, keeping it as backup.
According to DJI, the Air 2 takeoff weight is 570g (1.25lbs), with wind resistance of 18-24mph. The Air 3S takeoff weight is 720g (1.6lbs), with wind resistance of 27mph.
Even though the weight difference isn't much, I'd think the Air 3S would...