The Small Cars do handle the mud better...being front wheel drive cars.

But, when it gets REALLY muddy and even the Small Cars have no control, the biggest problem for them is that they are all front...once that car slams into the wall hard enough or in just the right way, the car will not run right for either the rest of the race (if you're lucky) or ever again.

Big Cars should be running on a drier track since they are mostly rear-wheel drive cars.

When it gets REALLY muddy, we see the Big Cars just start sliding around even at low speeds...you don't have much of a choice since if you go too slow you risk sliding out of position during the pace laps AND if you go too fast, you risk slamming another car or the wall and eventually spinning out in front of traffic.

I like the idea that was mentioned about LESS water for the Big Cars and about the same amount for the Small Cars. That is something we will have to (or at least I would like to) experiment with...