3 different offroad tyre types, not including snow? (+solo games question)

Just went to upgrade the Ford GT70 (I imagine it’s not the only one) and noticed it comes with offroad tyres as default, as well as the normal upgrades of offroad and offroad race. What’s the difference? And which of these 3 tyre types would you say is better for Playground Games as opposed to races? And speaking of games, does anyone know how the solo games are scored? There’s no screen after each round to tell you leaderboard, the only indication of any position you get is after the third round when it says if you’ve won.

The stock ones are just lower stat versions. Offroad race = offroad, probably what you want for pgg. Offroad = rally tires, good for mixed surface.