My personal opinion is the S4. I am not a fan of apple or IOS, I think they are incredibly overpriced for what you get. I dont like the fact that everything has to be done through Itunes or that everytime you need an upgrade you have to hook it up to the computer. I think the S4 has a lot more capability for customization to your exact needs. That being said I know apple fans will hound me on this one.