Uh no! hull on the X15 is different as is the wake.
The wake on the X15 is actuall much better shaped and easier to dial in. Will take a little more weight to dial it up, but the shape and tranny's of the wake are much better than the X2. The running surface on the X2 is def shorter.
Most riders prefer the wake of the X15 over the X2 for shape and size and also the room in the 15 over the X2 is huge. Running surface is similar but not the same