Having megapixel is fine but the software and hardware also is important.
It has a laser autofocus system so it continuously focusses while taking a photo or video.hence you need not double tap .also, it gives a bokeh effect.means Dslr like effect(that is backgroung blur .in layman’s language). which is not present in moto g 3
Also it has electronic image stabilization, hence when you walk while taking a video, the video does not shake