Goblin should take the W solidly here, due to glider giving him 3D offense which will more than compensate for the size/power difference (this is the 40ft tall Kong, not the 400ft one that fought Godzilla last year). All he would really have to do is sneak in, spam bombs, get out of reach, repeat.
Goblin wins in a good fight without the Glider. The size difference would make it hard for him to inflict significant damage on Kong and he would get flung around like a Rag-doll throughout the battle but he could probably shrugg off all of Kong's attack and eventually punches holes into his skull or maybe snap his neck.
With his Glider and weapons, Norman turns Kong into paste.