The Sony Xperia Z2 has a 5.2-inch screen that runs at a resolution of 1080 by 1920, putting the pixel density at 424 pixels per inch. The phone has a 20.7 megapixels camera that supports face detection, autofocus and HDR.
The Galaxy S4 by Samsung comes with a 5-inch screen running at a 1080 by 1920 resolution. As such, the multi-touch screen has a pixel density of 441 pixels per inch. The main camera of the S4 can take pictures at up to eight megapixels resolution and has an LED flash, as well as autofocus and panorama capabilities.Learn more about Mobile