Hiking sleep kit consists of a foam pad bivvy bag sleeping bag, is extremley quick and simple to pack unpack and can sleep virtually anywhere.

Camping kit consists of a tent, bed of some sort, matress topper of some sort and sleeping bag. Its complicated, time consuming and needs a large piece of ground

One weighs 1lb 13oz / 800g plus sleeping bag, the other weighs more for each component. But the one is very comfy and relazing.