it looks similar to the other but has several hardware improvement and comes in 3 colors schemes, black with grey,white with gold and white with grey
The most important new feature of the iPhone 5S is its home button, which has been redesigned and includes a fingerprint scanner.The fingerprint scanner will allow you to unlock your phone by
placing your finger on top of the home button. It will also let you sign into
apps and the iTunes store so you don't have to enter in a password every time
you download a new app, song, or video from Apple. The iPhone 5S stores your
fingerprint on its processor.
The home button no longer has the same circle-in-square design. Instead, it's completely smooth and has a stainless steel ring around it. The home button itself is made of scratch-proof sapphire.
The next big feature is the camera. Apple improved the camera
sensor in the iPhone 5S to bring in more light and show bigger pixels for
better overall photo quality. The camera flash now has two LED lights, which
will help colors and skin tones appear better in low-light environments and comes with image stabilizer that prevent you from taking blurry photos.
As for the camera software, you'll be able to take several photos
at once in "burst mode." The software will then help you choose the
best photo of the bunch.
Under the hood, the iPhone 5S has a new processor called the A7.
The A7 processor is twice as fast as the processor in the iPhone 5. There's
also a new chip called the M7 that houses sensors like the compass, gyroscope,
and accelerometer. Health and fitness apps will be able to use the processor to
track your movements.