Two promotions, the same rules, opposite instructions to the judges
ONE and GLORY permit almost exactly the same techniques. One tells its judges to reward accumulated clean striking; the other tells them to reward nearly ending the fight.
Watch a ONE kickboxing bout and a GLORY bout with the graphics removed and the rules would not tell you which was which. Punches, kicks and knees legal in both, elbows banned in both, clinch broken quickly in both.
The judging would tell you immediately. GLORY scores conventionally: ten-point must, round by round, weighing clean and effective striking, with volume and control accumulating within the round. ONE publishes criteria directing judges to assess the bout as a whole rather than round by round, and to weight near-terminal impact above accumulated clean landing.
That inverts outcomes. Under GLORY criteria a fighter comfortably ahead on volume who takes one heavy shot has still won the round. Under ONE's, they may have lost the fight. Coaches treat the two as different strategic problems and prepare differently for each, which is the clearest evidence that the difference is real rather than rhetorical.
The results bear it out. Giorgio Petrosyan spent close to a decade at the top of the sport on a style optimised for volume-and-defence scoring, then met a judging philosophy that weighted damage first and was knocked out by Superbon.
Neither approach is obviously correct. Volume scoring rewards the more skilful striker and produces safer, more technical fights. Damage-first scoring rewards finishing intent and punishes coasting on a lead. What matters is only that they differ, and that a champion under one is not automatically a champion under the other.