I've got the DS versions of both games. However, the Galactrix port for the DS is pretty crappy imo. It has a really low frame rate when you're getting rid of a lot of gems and the load/save times are really long and annoying.
DS
PSP
PS2
PC
Xbox 360
PS3
Wii
I've got none
just the xbla version for me. don't see myself getting any more as i got bored with this one. the puzzle mechanic is refreshing at first, but the excitements dulls when the combat never significantly changes. get new spells, stronger mounts, but doens't really change the gameplay. and it's not like the story will spur you to finish either.