Should I get iPhone 5 or iPhone 4S? No contract or with contract?

I don't know what exactly is so much better with the 5 compared to 4S?

I'm thinking to get it with no contract because I'll be in Europe over the summer so I'll need another contract over there for a few months so that likely wouldnt work if I got a 2 year contract here in the US

is the 5 much more expensive than the 4s?
and does the price vary a lot if I buy with/without contract?

IPhone 4S because it has a better touch screen glass it doesn't break as easily and its basically the same thing also um no contract or warranty this is my opinion also hope this helped!