What are the main differences between carbon and aluminum road bikes?

Carbon road bikes are typically lighter and more rigid than aluminum road bikes, providing a smoother and more responsive ride. Aluminum road bikes are generally more affordable and durable, but can be heavier and less comfortable on rough roads. Carbon bikes offer better vibration dampening and aerodynamics, while aluminum bikes are easier to repair and maintain. Ultimately, the choice between the two comes down to personal preference and budget.