Counting French and Germans as a single population group doesn't really make sense, since their languages are far more different than, say, the different flavors of Bengali spoken in Bangladesh and the Indian state of West Bengal. And of course the French government's childcare policies are quite different to Germany's. France is also more liberal than Germany in granting citizenship to those of other ethnic groups.
Did you know that languages even within different states in India can be vastly more different than the differences between French and German, all with a different script and all? Yes, India is probably more diverse all on it's own, compared to all of EU perhaps.
But there is no political union between India, Bangladesh, where as EU is every day becoming a multinational super state, than a collection of independent sovereign nations.
Most interesting to me is Japan's projected population of 85 million in 2100, compared to 125 million today.