Regular is standard card stock. Plus is mirror foil. Premium is holofoil and double thickness. This is the case for all cards from the three Prestiges, not just the autographs.
VERY slow trading due to health problems. Not transferrable so safe to trade with, just moving is painful and can't always access the cards.
Cardboard History My COMC
New Collection Website: Cardboard History Gallery (Still under construction)
Tips on how to make your scans look like the card does in hand (No more washed out, fuzzy scans!):