Amusing discovery. I asked on Amazon if anyone went from the cantenna to the FA 26" antenna and what difference they saw and 2 of the 3 people answered that the cantenna is directional vs the FA antenna.
If one googles adsb and cantenna, the soda can antenna comes up. Google cantenna by itself and this directional antenna comes up.
en.wikipedia.org/wiki/Cantenna
and this one.
cantenna.com/
I remember the ‘pringles can’ antennas many years ago - popular back with most people didn’t have their wifi secured.
I deleted my question on Amazon.