artisans

Hello all, Coming off of the 1-hour flash sale of Gold Artisans, I got to thinking about the different versions of this deck. I see that the new ones are labeled Version 2021, but another copy I have is labeled 2019. Is there any difference between the decks outside of the number on the seal...

I hope this isn't an obvious question, but what does the AG symbol mean on the back of Artisans cards. I assumed the A is artisan but the G is a mystery