This document compares the specifications of the Samsung Galaxy S4 and Samsung Galaxy S4 Mini. The Galaxy S4 has more advanced specifications such as an octa-core processor, 2GB of RAM, a 5-inch screen with higher resolution and pixel density, 13MP rear camera, and larger battery. The Galaxy S4 Mini has less powerful specifications like a dual-core processor, 1.5GB of RAM, 4.3-inch screen, 8MP rear camera, and smaller battery. Both phones run Android 4.2.2 and have similar connectivity features.