nothing is ever simple
mini 3 pro quieter before takeoff. (but who flies a drone sat in takeoff position)
during takeoff the same,
in the air about the same… 
… call it the same
I fly around a lot of building sites and most of the time people are oblivious to the mini 3 pro… but I am normally at 40+ meters…
when I fly a 20m grid then people will notice it