Does It Matter?

2 cards red and 1 card black, are face down on a table. Let's say this nice man tells you that if you choose black, you win $100.
So you point one card. Let's say the card in the middle. The man gives you a favor and turn up one red card from the other two cards that you didn't choose. Now do you want to stick with the cards that you chose in the first place (the middle one,) or it doesn't matter?

Soh

p.s. no trick question, rather logic.