I've never used Tordon, my local supplier sells me a Grazon equivalent. It has shorter withholding and persistance than Tordon but still costs more than glyphos. It works well on gorse and blackberry in the paddock. Also knocks off other things too like wandering jew and ivy if I add surfactant, and sometimes I add some to the glyphos that I use on the metal drive because glyphos doesn't take down clover very well.
Gorse is in the same family as clover so that's why it doesn't work all that well for gorse without surfactant and multiple applications.
Personally I'd rather use fewer applications of the correct poison than more applications of a poison that is only partially effective.
It leaves more time for putting miles on the scooter
High miles, engine knock, rusty chrome, worn pegs...
Brakes as new
Bookmarks