The Nikon D5300 was the first Nikon DSLR to feature built-in Wi-Fi connectivity (previous models relied on an optional adapter) and the D5500 follows suit making it easy to share images instantly, or even use a compatible smartphone or tablet to remotely control the camera.
However, the older D5300 does have one notable feature which has been removed from the D5500, built-in GPS for geo-tagging images with location data. Users of the newer D5500 will need to use the optional GP-1A accessory if they want their camera gain GPS powers.