This Engineering Pilot features a number of significant differences compared to the production figure.
Besides the obvious missing coin, the paint deco on the face doesn't have the beautiful fade compared to production. The body is lacking the dark wash paint. The inner blister has some significant differences. It is hard to see in this photo, but the mockup has a Star Wars advertisement insert at the bottom where the production does not include.
Production on the left, preproduction mockup on the right.