Not much can be said about the differences in radiation exposure between WLAN routers, except that the devices always regulate the transmission power down to a minimum anyway. It is harmless with WLAN anyway, especially in comparison to mobile radio, because the maximum transmission power is 0.1 watts, while with mobile radio 2 watts are permissible from the mobile phone. And since the greatest radiation exposure occurs via the mobile phone anyway, it is most important to have good reception.
There are also routers where the maximum transmission power can be reduced at the expense of range, but I don't know if that is the case with this device.

Unfortunately, there are too many people on the internet who don't have a clue and just post their thoughts without even thinking for a second...otherwise so many people wouldn't be "afraid" of the radiation from WLAN, even though it is harmless as just mentioned. Unfortunately, this happens too often nowadays, so don't believe everything you read on the internet ;)