Fin Nor Regal 30 vs Fin Nor Light 30 and part compatibility

[wailua boy]

Aloha Ohana. A friend recently offered me a choice of a Fin Nor light 30 or a Penn International 30(first generation) in exchange for helping her with a favor. I insisted it wasn't necessary but I ended up picking the Fin Nor since I already have a few Penn 30's. Coincidentally I already have a Regal 30 that I've serviced and fish with regularly. Just out of curiosity, does anyone know the part compatibility and/or differences  of the 2 reels.
Thanks