Traveling around and operating the station from different (fixed) locations it sure becomes apparent that some are much better than others.
I use the Early Bird Net on 3.940 mhz as my reference.
There is no scientific measurement, just my perception. For some reason Tallahassee, FL is far superior to Destin, FL, Kissimmee, FL, and Crystal River, FL and they are all relatively close to each other and with similar sandy ground. I know the Ionosphere is not the same from time to time and place to place, but ............just sayin.
JIM