What are the main differences between cyclocross and mountain bikes, and how do these differences impact their performance on various terrains?

Cyclocross bikes are designed for racing on mixed terrain, with a lightweight frame and narrow tires for speed. Mountain bikes are built for off-road trails, with wider tires, suspension, and a more durable frame for rough terrain. These differences impact performance as cyclocross bikes are faster on smoother surfaces, while mountain bikes Excel on rugged trails with better stability and control.