So with the 12Z for $500 you get 5 less models, 1 less timer, a more expensive memory card, the ability to control mixture in flight and logic for switches ?

I have to believe it's the switch logic that causes the price difference.
Can some one give me a real world example of switch logic ?

Not trying to be a smart ar$e, as I to have been debating which one to purchase for some time now.