From my experience and research when I was buying Pugwash, it is very common and normal for Boys to be a bit chubbier and have a fuller body, No matter how much you feed them. Girls do tend to be a bit Skinnier.
The issue with "Lines" with Pugs, is theres no "Working Line" as such, because they were purely bred as a Toy dog, to sit there looking Pretty. So your only option really is one from a Show Line. All the Pugs I have seen on here pretty much conform to the British Standard for a Pug, nothing wrong with any of them.
Sumo looks almost identical to Pugwash, I would imagine he has a very similar breeding line..
Anyway - onto one of our new Family Members to be! One of them shall be named NomNom, the one we will be keeping