Maybe the big ones are made in texas and the little wall-mounted ones are licensed from another company such as Sanyo.

I'd guess it's a case of copying. The closest match I could find was between this Sanyo and the Goodman depicted in this PDF. Similar, but slightly jazzier cosmetics/louvering on the Sanyo. Of interest, where a bunch of the other heat pump and condenser PDFs say "MADE IN THE USA", this PDF remarkably does not. Probably not an omission, and I'd guess your intuition is correct but that it is a design copy/knock-off.

Ah, what we get when we try to save $1.48 in labor costs.