I think the typing rhythm and patterns on Colemak are a lot closer to Qwerty and as such, it is an easier transition, but also, the layout is more efficient for Spanish as far as I remember (can't recall the source of my claims though, sorry).
@ideus What do you mean the laptop layout? At OS level, you can simply add another keyboard layout (Dvorak) and alternate between layouts by pressing ALT+SHIFT. Just bare in mind that it changes it for the PROGRAM that is active at the time, which can be a bit of a pain when you've got multiple programs with different layouts at the same time haha but you can just press ALT+SHIFT again ...
I'm going through a long ordeal to get IT to allow me to add Colemak at work. I used to use Dvorak at work, but the editing short cuts (ie CTRL+C etc) were too difficult to use efficiently, so I'm back on Qwerty at work for the time being. ><