The primary differences between the Phantom V4 and the Phantom V4X are the throttle system and tire technology. The Phantom V4X features the New V8 Throttles, which are the same as those found on the Apollo Pro, offering enhanced control and responsiveness. Additionally, the V4X is equipped with self-healing tubeless tires that incorporate PunctureGuard Technology, providing added durability and peace of mind against flats. Due to these upgrades, the Phantom V4X is priced $100 higher than the Phantom V4. Both models maintain the exceptional quality, performance, and Canadian design that Apollo Scooters is known for, ensuring a reliable and thrilling ride.