You sound dense, if boxing was done in a giant octagonal cage with 4oz gloves but with the exact same boxing rulesets...it would look apparently different and angles, ranges, timing, movement, defense and offense would all be different. The arena of which you fight in has literal laws of applicability that are different from space to space and shape to shape. Same goes for rules, in amateur boxing you have less rounds and then there becomes a bigger focus on aggression rather than defense, the type of conditioning, punching, angles etc all appear a bit different...Olympic gold medalists aren't lesser athletes or less skilled than pro boxers, it's just a different sport.
That being said, of course boxers in general are much more nuanced and refined in their movement and technique for punching than MMA fighters are, duh. But there are differences that do and do not exist in each sport because of the rules and arenas along with many other factors.
