I don't know yet because not enough info has been revealed about the differences between the two versions. Chances are, unless there's some really awesome preorder bonus (lol) I won't be purchasing any of them until I get a 3DSXL, which won't have a broken R button, allowing me to play LM: Dark Moon, Mario Kart 7, etc again or for the first time. Then I'll probably get both if I happen to like the games enough.
I'll be getting X, my twin brother will be getting Y. Without even noticing, he would always get the one that is said 2nd when you say them together (Blue, Silver, Sapphire, etc) once we noticed it we decided that was how we would select who gets which game.
Hardual Casuacore - The new generation of nobody-should-care-what-the-pigeon-hole-tag-is. Good games are good, bad games are bad, opinions are opinions. Period.