The GS5 offers more screen real estate and more pixels. It gives you 62 per cent more real estate and 185 per cent more pixels than the iPhone. Samsung also says the screen automatically adjust elements like colour gamut, white tone and contrast.
The iPhone 5S comes with 4in display, in a 10:9 aspect ration. It gives you a resolution of 640 x 1136 pixels, which makes for a pixel density of 326 ppi. The iPhone's Retina Display, while much lower-res, still looks pretty damn sharp. However, in comparison to larger full-HD displays, the screen looks a bit cramped.
Fingerprint sensor/scanner
Both these smartphones come with fingerprint sensors.
The big difference between these sensors is that on iPhone 5S you can unlock your phone by resting your finger on the home button for a moment, on the GS5, you have to swipe your finger from the bottom of the screen down to the home button.
For GS5, Samsung has partnered with PayPal. You can use your print to authorize payments associated with the popular service. The iPhone's fingerprint payment options are limited, for the time being, to the iTunes and App Stores.
Heart rate monitor
The GS5 has a heart rate monitor that sits below its rear camera and works by firing a red light through your finger. From there it can capture your pulse so it knows how fast your heart is beating. This information is then shared with Samsung's S Health app. Once captured your heart rate is added to a graph so you can plot your heart rate over time and these can then be viewed back in hours, days, or months.
On the other hand, iPhone doesn't come with a heath app of its own, you have to use third-party apps to access and record the information. There's a dedicated app called Instant Heart Rate. It allows you to log your heart rate, tell the app what you were doing at the time (resting, exercise, standing, etc), and see trends over time.
