When you buy tickets or vacation package thru your AAA, you get a card for the perks they advertise
That card is to be shown for discounts on food/ merch/ park perks
For the shows in the parks , express lines allow early seating for shows
It really isn't needed as all seats are decent most of the time
But it is beneficial when parks are crowded!
Assume you would show the AAA card if you were allowed to use the express line for the two shows you mentioned
It wouldn't help for T2 as all lines empty into the main wait area for the pre show
Once the pre show is over, all enter thru the doors to the seating areal