A skybox and a 360 pano are the same. However if making a skybox for rendering your rendering s/w will probably require the image in a specific format. Many formats are used by different s/w.
Equirectangular projection is one of them, othes include 6 separate views, or a cross format image or dds file. There are many other mechanisms, formats, projections to enable this to happen.
Its up to you to convert the resulting skybox/360 degree panorama into the specific format your rendering s/w requires.
