It doesn't even matter. Even if you pretended "Europe" was a unified country, its significantly worse with significantly less options than the US.
You realize, we have 100 breweries in the county I live in.
Couple of things. One, I'm an American living in Europe. Considering the last place I lived in the US was in SoCal, I'm very well versed in the glories of BevMo. But, you know they sell American beers over here, too right? And Germany hasn't been held back by the Reinheitsgebot. It's the defining characteristic of a fantastic range of beers. So, the whole "we have 100 breweries nearby" is true out here, too. There is more attention to locality and tradition, which sort of comes with the territory of being older.
Two, it was a joke. Great beer is great beer, no matter where it comes from. It's summer, so I'm enjoying Pils from Pils at the moment. For my tastes, there aren't any American summer beers that I enjoy as much as some of the Czech pilsners. During the fall, the dunkelweizens from Monschof are my favorite here, but I definitely miss some of the more hoppy American brews at that time.
And uh, I sometimes enjoy a nice fruity ale, which doesn't really seem to exist out here, save for the American imports. Radlers do not fucking count and anybody who enjoys those might as well suck on lemons.
On the other hand, too many American local breweries are so new, they're enamored with the fact that they're a craft brewery. It doesn't matter that their beer is shit, because it's craft. There are 100 breweries near you, but I guarantee only a few of them are worth a shit. Time has a way of sorting those out.
tl;dr: American breweries are the wild west, German beers are time-tested, Oktoberfest approved. Neither is strictly better. But Czech pils are the best in their category.