New Wireless USB Adapter purchase

I'm about to purchase a new Wireless USB Adapter. I have the one listed first below.

I added an N connector to it to attach it to an antenna. It does what I wanted it to do.

I will purchase a second Wireless USB Adapter, I'm looking at this one.

This one says up to 830 meter range outdoors. Hard to believe! There are no distance claims for the one I have. The output power shows the second one has 1dbm additional power, negligible. The second one claims higher signal rates, 108mbps, I assume that's useless if the router is 54mbps? If you know of an inexpensive Wireless USB Adapter with a connector I'd like a link. Looking for opinions for a purchase. Thanks, Mike