The game provides hours of fun. Here are three recommendations for getting race competitive at Pro or Real modes. Focus on the racing line and do lap after lap until you're consistently running world class lap times. With the GForce card and DirectX 8.0 and all graphics options max'd out and resolution set at 1280x1024, the graphics truly make the game. Rider, bike and track details are better in 2001.
Tires are less squared off.
I didn't notice this on 2000. You feel like you're constantly being led by this effect as you navigate the track. Also, track colorations have changed and the tires seem not to be firmly planted on the pavement at times. But these are minor issues that don't detract greatly from the playing experience. Puffs of smoke during downshifts, shadows, reflections, shading and brightness variations at different points in the track come together to create a great visual experience.