Metal roofs offer a longer lifespan, greater durability, energy efficiency, and are environmentally friendly, but they come with a higher initial cost and can be noisy during rain or hail, with the potential for denting. On the other hand, shingle roofs have a lower initial cost and provide a wide variety of styles and colors, along with being easier to install and repair. However, they generally have a shorter lifespan, are less resistant to extreme weather conditions, and may be less energy-efficient than metal roofs.