The Explore is an Ebike that is bigger (26"x 4" fat-tire), more powerful (has a 750w motor), and has a faster speed (up to 28mph) than Heybike Mars. It also has a longer range (70 miles per charge under PAS mode) than Mars. But also please be aware that the recommended height of Explore is 5'9"-6'6" while Mars's 5'3"-6'3".