There are a few ways to tell the difference, but the easiest is to look for the lock releases at the end of the handle. You can see the button at the sides of the base of the handle, and you can also see the little cutouts where they go in beside the smaller handle screws.
The easiest way to tell a New Wave and a Classic Wave apart is by looking at the knife blades.. Is the Charge an AL or ALX?
Christ we need lives!