score:2
How fun for you.
Every airline and airport has slightly different signage so pay attention.
Air France flys only one configuration of the A380 with Rows 1-51 on the lower deck and 60-93 on the upper deck.
Also, all First Class seats are on the lower deck and all Business and Premium Economy are on the upper deck so if you're in one of those cabins, that's where to go.
Other than there being two, there's nothing really special about either one. They both get there at the same time :).