The Mustang is available as a coupe or convertible, the Charger is a full-size sedan. The Dodge is also much taller overall, with the Charger adding about 10 inches to the length. In general, the Mustang's engines are generally better than the Charger's. The base Mustang EcoBoost four-cylinder is more efficient and produces much more torque than the Charger's base V6. All in all, if you need a usable rear seat or want all-wheel drive, then go for the Charger. If practicality and rear-seat comfort aren't important, then the Mustang is a more nimble sports car to buy.