The main difference between UberX and UberXL is that an UberX car can only fit 4 riders and an Uber XL car can fit 6 riders. Uber X - Uber's budget option. ... Uber XL - The Uber X for SUV's. While a typical UberX car can only seat up to 4 people, an Uber XL will have seating for up to 6 people.