This chat peaked my interest so I took a closer look at the stats. NG makes more US models than GJ, but does make a lot of near duplicates. Then again GJ does make some too. When you remove the duplicates GJ and NG are basically making the same number of US models (GJ slightly edges it), but of course NG is also making 80% non US material as well and GJ is making only 47% non-US.
The argument that GJ makes more, and more diverse US releases really doesn't hold any water. You may prefer GJ's US releases, and that is a very valid opinion to hold, but presumably there are plenty of US collectors who prefer the NG US releases??