imo the suits that allow you to skip sections of the game should count as IL runs, for example, the library suit can only be used to run the library and if you wish to run the GateHouse (starting area) you should only be able to use the classic suit

I recently got into speedrunning after watching some AGDQ runs, also from just playing some sonic mania time attack and showing some friends my times, Hope to speedrun more games!