Good afternoon, As a person with very limited understanding on tech issues, I need to purchase a new modem, as I am changing NBN providers. I am looking at the Archer AX 72 & Archer AX73 - not the pro

As a 70 year old who is not very understanding I want to purchase a new modem? - I currently have a NBN box with a telstra modem, but want to chnage the Telstra modem. What is the difference betyween