text: It depends on the speed and what you both weigh.\n\nAssuming that you both weigh 150 pounds:\nRunning - 6 mph\n  170 calories in 15 min\nWalking - 4 mph\n  340 calories in 1 hr\n\nSo if those weights and speeds were correct for you and your friend, you are burning more calories.\n\nYou can use the link in the source to test out different numbers.