If we took your worst performing wifi device to an empty field in the middle of no where it would work perfectly. In comparison to my office in the city with walls that are nearly three feet thick with no cavity made of stone and rubble, the building is nearly 200 years old there are electrical conduits to all the hallogen office lights and two electrical conduits circle the room, theres old telephone equipment, servers, networking, 4g repeaters, a nest wifi router and 10 iMacs. Look I dunno what exactly causes the wifi black hole that is my office but it should be pretty obvious that wifi in the space is a challenge.

Anyway air drop won't work, move a foot away from your imac and your ear pods will drop their connection. Wifi has way more to do with the space than it does the hardware, think about it the only way apple could improve their signal above the competition is just to boost the signal strength and they can't do that because its agains't government regulation.

If you bought three brands of lotto ticket each with the same payout spec but on paid out while the others did not would you think that the winning brand of lotto ticket had better odds? or would you think that you just got lucky that time?