What's the difference between the iphone 5s and 5c besides one being plastic?

Trying to decide which one to get

IPhone 5S has a new A7 64 bit system chip that's twice as fast as the iPhone 5 A6 chip.
iPhone 5S TouchID - use your fingerprint on the home button instead of a password.

iPhone 5C is made of hard coated polycarbonate material and steel reinforced.
It contains the same A6 processor and 8 megapixel camera as the iPhone 5.