It doesn't matter what they call the dies. It's the relative position in the stack. In recent prior history, the xx80 GPU was almost always made on the 102 die, which was typically the top consumer die.
Nope. It's been the 104 die. Ampere changed that and they used a heavily cut down 102 die instead of the 103 because of TTM pressures from porting Ampere's big dies to SS8 from SS7 and because even SS8's yield was mediocre.