Have you noticed the unique design? The new version of the X-Wing includes an element that Ralph McQuarrie and Joe Johnston originally designed for the original first Star Wars movie but was never used. Specifically the circular engines that split into two half circles. The classic trilogy design had two cylinders on each side. A new aspect that has been added for The Force Awakens is that the wings themselves split vertically as well as horizontally, with the front of the wing pushing down and the back half up.