qeustion about 100%
There are separate categories for JJ100% for each difficulty if that is what you are asking. For the platinum trophy speedrun if that is what you mean by 100% you can play on any difficulty but you usually play on proud because all of the trophies for completing the game on lower difficulties get acquired on completing a single proud mode playthrough.
100% doesn't really have any difficulty attached to it as it's a legacy / dead category. The only reason it still exists on the leaderboards is due to there being a run, however that one doesn't even have a video remaining. If you want to look for a "good" 100% category you might want to look into JJ 100% or Platinum Trophy RTA.
Recent runs