An access point does not do what your router does to share the Intenet connection.
It wasn't long ago you would buy a router then add the AP. Today, they are all in one.
As to range, they should be similar or same. But an AP could let you run Ethernet to the AP which is closer to where you need coverage.
Finally, if you buy a router, you can configure it to be an AP. But and AP can't be configured to be a router.
I've been using a router forever and really don't know much about it. I know that I need one but what does a access point do? I need a better range and a friend told me to save money and buy an access point. Will this work?
Will this work?? It's used but price is my incentive for looking into this option.