I'll be getting Moon because I really like the look of Lunaala. Usually my bf gets the other version so we can trade Pok?mon, but I think he wants Moon as well.
I think I'll get Moon, I don't know for sure though because with XY I wasn't very taken in with the game, but I don't know, I like all the new Pokemon and the redesigned ones so I might have to go for it.
i'm a huge sucker for lions so i'll be definitely getting sun. with that said, i do like the fact that both games are twelve hours apart and will probably end up playing both because Lunaala is also freaking awesome.
i might be wrong but i think the game works with the time of your 3DS. So if you change the time twelve hours later it should be day when youre playing.