Are you asking about differences between Roadmaster, Blue Ox and Demco? Or about adapters? The Roadmaster adapters are for connecting Blue Ox or Demco tow bars toa Roadmaster base plate. Blue Ox has adapters for Roadmaster towbars on Blue Ox base plates.
Any of the three major brands is a good choice. I used Roadmaster Falcon on my two Trackers for several years. Switched to Blue Ox Aventa LX with this car because the base plate is less bulky. Not a big deal - mostly just personal choice.
2004 American Tradition; 2013 Buick Verano
Homebase in the Ocala Nat'l Forest near Ocala, FL