The efficiency of wireless is quite a bit less, if you use an app to measure what the phone ingests, it is often a lot less than the input to the Qi transmitter. All my wireless are "old tech" Nexus 4, 5, 7 from 2011-2013 vintage but from about 1.5A input to the Qi transmitter, the device is getting 300ma when a USB cable is causing more like 1A-2A input. That is fine for trickle charge, top-up but (I also have used mobile for navigating) I need a decent 1A minimum going into the phone to balance demand and even then sometimes the phone's charge is going down (thermal throttling causes power in to reduce when CPU is hot when busier) and wireless makes more heat than wired.
I have RAVpower and Choetech Qi transmitters, nothing Anker.
The probability I'm correct is 25% as I'm extrapolating from old tech.
I love wireless charging, good for bed side, office desk, type situations.