I gotta tell ya im an equal fan of both and im surprised this is as heavy as a debate as it is- i always thought it was just understood in the Tohoverse that Kong bested Godzilla. After i saw Skull island and out together all the emphasized facts about Kong it played as a promo for him winning the fight.
Godzilla is a heck of a monster, his Legendary counterpart is the weakest of his incarnations but that was necessary to make this more realistic, i look at Rodan and im betting he has better armor than Godzilla, i look at Mothra and i see she has way more weapons but has to keep her distance and it seems Ghidorah in the Legendary universe is the toughest incarnation since the final wars version, he looks way more nimble and i think Godzilla will take him down just in time to survive ans will get some help from Mothra to keep him busy. This being said-You line all the stats up and Kong still has him beat. They will play up Godzillas standing in KOTM but then shock the audience when we get reintroduced to Kong and him snag Godzilla by the tail and chuck him across the city. This happened before and will undoubtedly agian, its even a model kit. I understand comparing the Toho Showah series to the Legendary series can be viewed as inaccurate but its way more similar here than say the 90s/ Millenium series. Kongs even tougher here than he was in the Toho days AND alot of people like Skull island better than the first Godzilla and i think they know it. Kong takes this one, we should be more concerned about what threat they face, the only thing we haven’t seen is Mecha Godzilla