but have watched several of the comparison YouTube videos that prove that they are about 5 DB quieter than the original ones.
There isn't a single video with a properly controlled test that shows anything of the sort. Even the platinum mavic with its optimised ESCs are a max of 4db quieter for *some* phases of flight. 1-2db seems to be the going rate for people with properly calibrated meters who have made some attempt to remove other variables. And you wont hear 1-2db difference.