Well think about what i said and back then when the movies where made we had worst weapons and we beat godzilla so if we had newer weapons to we and could not defeat cloverfield but if godzilla can come back with one cell and cloverfield has its babys then it would probaly never end any way unless we helped one of the sides.
"And my soul from out that shadow that lies floating on the floorShall be lifted — nevermore!"
I would say godzilla since he did defeat many other monsters in the movies even when he was on monster island
And as for the fight between godzilla and "Princess" i completly beleive that godzilla would downright own. I mean in cloverfeild the monster was being hurt by men with bazzoka's. godzilla walks around while being fired at by tanks, and jets.
Made by me.