Great question! The IPhone 5s is Apple's new flagship model. The 5s features brand new features that are not yet incorporated into all of Apple's other products, these new features include things such as a new fingerprint scanner, enhanced camera, and a faster A7 chip. The 5c is simply the more budget Iphone, it comes in a variety of colors and has more of the features that the original Iphone 5 had. The 5c will not have Apple's new features that are in the 5s. Hope this answered your question.