@ukmartian You'll know that when you set the same SSID and password and observe if the plugs are re-connecting successfully. If they don't, then you have to re-add them, because depending on the...

@the_potato There shouldn't be any interference since it's the same transceiver for guest and regular Wi-Fi, just different SSIDs.

@PKP Are you sure about the router 2 ? AirGrid M5 HP is an Ubiquiti wireless access point CPE.

@ukmartian Judging by its web interface you can't use a separate SSIDs for the 2.4 and 5 GHz bands:

@PKP What's the make and model of Router 2 and what is its purpose ? To which router your client devices are connected ? Is it feasible to set the router 2 in AP mode so you'll avoid the double NAT...

@Bacardee Theoretically (since the wireless is a half-duplex technology) it could reach 433 mbps (in reality always less), but in favor of your wireless stability I would recommend the C6 in AP mode.