I said this wasn't going to be "scientific". The app that measured was run on an iPhone 8 with the front of the phone facing the drone, held at ~7 inches directly in front of the drone (Zoom). See attached for the app info. I encourage you to do your own testing. The app is also capable of measuring frequency which I did not capture. It is also capable of recording video & still photos. (See my profile pic)
It would appear they are both very similar. For 1 minute the OEM averaged 76.3 DBA and the MAS averaged 75.8 - both quite different from what you see in my profile pic, which was not an average, but a snapshot.
@Paul2660 mentioned them sounding different and I think that is what people queue in on and relate the difference to sound level. That was post 5 of this thread.
View attachment 110957
Edit
The post that
@Paul2660 was referring to is
HERE and has a lot more information.