Not a hell of a lot.
The model on the left is one I just painted using the German Uniform color I bought earlier today, along with the pants being the same Adeptus Battlegrey I had used as the basecoat for the other model. There is no highlighting on the left model. And it's kind of hard to tell the difference.
So I'll definitely go with the left model's paint scheme. I'll think about some kind of wash or "dip" after I've gotten everything looking decent, but that's getting into the "nice if I can get there" area. But with how easy it was to get this level done, I foresee getting a lot of these guys done to this basic level within a few days.