I'm ignorant and don't finish, but I want you to tell me the difference between these 2 systems in speedrun. Why is JPN/NTSC slow? 
I don't finish by translation.

Crash Bandicoot 3: Warped

About the difference between these USA/NTSC and JPN/NTSC

Crash Bandicoot

Crash Bandicoot 2: Cortex Strikes Back

Crash Bandicoot: The Wrath of Cortex

Crash Twinsanity

Super Mario World

Sonic Forces

Crash Bandicoot N. Tense Adventure

Sonic Frontiers

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Sonic Generations (2024)

mimizuku