Hi, I want to start running the game, but the one I have looks way different to the ones I see on the leaderboards, mine would be played via PSnow on a playstation 4, is there a category for psnow version?

That would be the Heavy Iron version of Ratatouille, which is an entirely separate game with its own leaderboard over at https://www.speedrun.com/ratatouille_heavy_iron