Does anyone know the differences between the AX20(US) and the AX1800? I see the AX1800 is sold at Walmart for $99 whereas the AX20(US) is sold at other online retailers for $129. Looking at the specs

I'm new to TP-Link routers and so far is it works great. I picked up the AX1800 from Walmart. The one thing I noticed is that it issues the router's default DNS twice. Is this a bug? I have attached a