When was that? Last time I tried it was a couple of years ago.
As for the difference, outside of Spain the conjugation of Vosotros (you, plural) isn't used, but speaking to strangers is much more formal. Also, there's a lot of vocabulary differences which can be confusing for non-native speakers.
Good luck with your learning, it's a great language :-)
Do you know if Retroarch has controller support?