I would advise you the Galaxy, as u can buy it now and u can see its specifications, so its not like iPhone5 that is still a myth :).
Someone from Apple said that the new iPhone will kick Galaxy SIII's ass, but as all of us know, EACH newer telephone beats the older ones and iPhone will be released about 6 months after the Galaxy. So, what are we talking about? :)
I have a Samsung phone for 1,5 years now and I am deeply in love with it. If u prefer Android and Samsung, you should make a good deal.