Yeah if they were both real, with all the lore that goes behind them. Godzilla would blow a hole through his torso in 3 seconds and it would be over with. Kong has lost to WWI planes on a tower... They had to destroy the environment, and wipe out a whole ecosystem with the oxygen destroyer to "kill" Godzilla. Kong wouldn't even beat Gigan, Destoroyah, Mecha Godzilla, Biollante, Megalon, Space Godzilla, or Hedorah.... Jet Jaguar could probably beat Kong!
OMG! https://screenrant.com/godzilla-vs-kong-trailer-mechagodzilla-blueprint-design-hint/