Just to make things a little bit more clear in terms of the size comparison I added an image.
4/3": 17,3x13 = 224,9mm²
1": 13,2x8,8 = 116,6mm²
1/1.3": 9,6x7,2 = 69,12mm²
First of all, as a proud Air2S user, I am disapointed about the smaller sensor.
But there a some...