I don't know if you've seen the new Godzilla movie, but he does NOT drive the plot. He's not the central threat. He's not A threat. He's a big question mark of nothing, uneventfully swimming across the ocean, carefully avoiding toppling the military ocean liners, ready to end the movie. Nobody is awed or scared by him. None of the things the characters do reflect on Godzilla or even depend on Godzilla. Ken Watanabe's character says "Let them fight" (Godzilla vs. MUTOs), except they don't even do that, the military are stupid and want to bomb the motherfuckers some more. The conflict of the movie lies in the threat of two MUTOs. This isn't even an opinion. Carefully look at what the characters in the movie say and do, and you'll see Godzilla doesn't factor in any of it. MUTO causes earthquake, MUTO escapes Monarch, MUTO wreaks Hawaii, other MUTO tears toxic waste, levels Vegas and goes to Frisco, other MUTO assaults military convoy, both MUTOs mate. The characters think, act and react entirely around this. They are victimized by this or survive this.
So when you conjecture that Godzilla is the same as the xenomorph from Alien because we don't see a proper body shot until the end, also think about set up, character, motive, conflict and action.