Holy hell people, this is stupid simple.
Godzilla weighs more than all of the Jaegers in the program combined. On average he outweighs each of them by 36/1. It doesn't matter if their size is comparable because their weight and durability are not.
In addition nothing the Jaegers do can hurt Godzilla, he already tanked the Castle Bravo nuke and lived, a nuke that is 10x the size of the one in PR that nearly killed the strongest Kaiju. In addition to tanking dozens of other types of ordinance and the stabbing and slashing of both MUTOs for days on end.
Godzilla weight, density and durability, coupled with the fact that he can easily take out multiple Jaegers at once with Atomic Breath or his tail give him a decisive victory.