Not mentioned, but noise. The Air is as loud possibly louder than the Spark, and the Spark IMO is quite loud. Both Spark and Air have smaller props, and seem to have a much more noticeable whine, bee sound.
Plus to the Mavic Air, is that DJI most definitely tweaked the noise reduction algorithm and you can get excellent video including shadow details. The MPP can get there, however you need to be using a custom style to control the noise reduction. And of course the bit rate for 4K is higher.
As already has been mentioned, Air is "enhanced WiFi" and there has been enough written about range/disconnections/ etc. The Mavic PP with ocusync is most impressive. I have gotten as far I ever would want to go over 1 mile out with full signal. With iPad no video issues, sadly with the
CS monitor, that is not the case.
CS has a ways to go IMO just no reliable and for the cost that is most unfortunate.
Camera to camera, I would be very surprised if there is really much difference, as both are core 12MP sensors, and odds are the same exact sensor.
Mavic PP, has a longer time in the air, which I love, has a read out on the actual controller, (has saved me more than once with video lockups on
CS) and it's just not that loud. Many people are not as concerned it seems on noise, but it's the noise IMO that get noticed before anything else.
The Mavic also allows for portrait orientation (rotation of the sensor not gimbal which is an excellent asset for panos from stills). Mavic also has focus, which many folks over look and possible get into trouble as they are filming with the lens out of focus.
Mavic PP is very flare prone, with the sun coming from the side and the flare is most destructive. You can add a hood to help however this adds complications. You can't fly fast with a hood as the hood will show in the video and 9 shot panos are out, as the hood will show on the top shots and also the 360 panos are out with a hood. Not sure how the Air handles flare.
My wish, a MPP, 20MP, larger sensor, (don't think a 1" sensor will get into the solution, but 12MP is limited for printing).
Paul Caldwell