Should i get IPhone 5C or 5S?

This Christmas I gets choice on these two phones! I could either get the 5C 1GB of data or the 5S 500MB of data for the same price!
I use twitter and Facebook and Instagram without Wi-Fi
I use youtube and downloading pictures with Wi-Fi
what should I get, what will be money's worth?
I could get the 5C for the same price but more data:/

Red 5C