That looks solid enough.
I use ethernet over power at home (www.amazon.ca/TP-Link-Powerline-Pass-thr...r%2Caps%2C228&sr=8-5) and as of yet haven't tried the wifi of the quieter-3C in the field in real circumstances.

You should be able to measure your wifi strength under both scenarios. I've used the WiFi Explorer.app to measure signal strength and look for congested channels. I presume any computer would let you see it's signal strength from the wifi.

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