I've seen this done. They use the same frame, wiring, and same datasheet format. But one panel is made from mono crystal wafers and the other panel is made form poly crystal wafers. That's why you have to read the datasheets carefully. Mono panels are more expensive, generally, I believe.
Because the crystal structure is different, the ratings change slightly, and so do the details like thermal gradient factors. Monocrystals look like one continuous sheet of dark blue, while polycrystals have a patchy look, which is easiest to see when you shine light on it at an angle.