In size, height, strength, and mass. Seems like to me the typical German woman is 5'11" (180 cm) and the typical German man is like, 6'3" (190 cm). Meanwhile, I'm a short little American over here, all jelly.

I at least heard the Danish grew so big, so quickly (in like one generation; 30 years or so) due to their diets. But Germans don't eat the same food. In fact, their food tends to be worse and a lot less healthy! And many American foods started from Germany, yet collectively, we're not very tall, big or strong, at all. (Excluding obesity rates.) Americans are small.

So I have no idea why Germans have better genetics than most of the rest of the world.