There is no blanket answer for this question. It really depends on what your priorities are and what your project entails. In general, concrete is a little more durable, requires less maintenance, has lower toxicity and absorbs less light and heat than asphalt. Concrete endures warmer climates better, and come with a variety of aesthetic options. On the other hand, asphalt is still very durable, more easily and less expensively repaired than concrete, 100% recyclable and offers a sleek aesthetic and a smooth ride. Asphalt can be better for milder and colder climates and is overall the much cheaper option. Ultimately, your decision is about weighing these differences. For a more detailed comparison reference our blog post on the topic.