I dont recommend renaming them separately, that could cause connectivity issues when a device switches from one band to the other, example would be a mobile phone/tablet, connected to the 5ghz when nearer the router/AP and then switching to the 2.4ghz when at the end of the garden, 1 it may not auto switch as its a different SSID and 2 if you're using the phone and it does switch, it can drop the connection. Thats my take on it anyway...