Thinking back on the discussions and decisions I remember, they all concerned countries that were similar to each other, and in a sense they were discussed precisely because of that. In theory you might have Indonesia as your home base and pick Ghana as your second market (the most different countries in that table), but in my experience people pick a country near/similar to the one they already know, where they already have some success. So yes, I think France/Germany a great example.

Further, I suspect that because they're similar in many other ways, they're also similar on that graph. It's not just a coincidence.