I agree .. Also Augustine .. the blades you are recommending are out of size with the Autel spec. which should be 9.5 x 4.5 .. and as you said .. Don't declare their use to Autel in any event, as your drone will not be covered by Warranty.
Of course the are out of spec, that is why they perform better. They are made by a company that actually makes props and have all the documentation to back it up on their website. Unlike Autel who just contracts the props out to a cheap wholesaler these guys know what they are doing.
Some comparisons of the DJI P3 (Yiwa) brand to the Autel. The red ones have a lower sound also. What if you attached small whistles to them? That would drive people crazy. Dog whistles would be even worse.