"The faces, the drooling, the crossed eyes, the constant saying "penis""
they explained the difference right there. edging is just jerking without cumming for a long time, gooning is all the extra shit on top.
people who are gooning are generally edging, but edging by itself does not gooning make. it's edging taken to a proudly porn-addicted extreme. it's weird, depraved, intentionally humiliating, has its own terminology. a lot of "bros bating their dongers" lol
a lot of it is a bit much for me personally, but i do find some of it hot