Amerindian = People from the Americas who look similar to today's American Indians
European = People from the region defined as Europe who look similar to today's Europeans (may or may not include North Africans/Levantines)
European culture, Amerindian culture, no, but people who look more or less the same, sure.
And a TL in a year right at the dawn of the Neolithic and agriculture globally can't somehow result in the situations for the New World and Old World being reversed? Ridiculous. We see all sorts of "what if X plant and Y animal was domesticated" threads and TLs, but the only time we ever see "what if X plant and Y animal wasn't domesticated" is in the context of an empty New World.
Exactly: no practical meaning. We have no clue what that society looks like, what kinds of economies, religion, technology, language, politics, history... quite literally nothing else but the most superficial physical traits. And there's a good reason why Europe can't be talked about in terms of isolated primativeness.
Physically you can't keep it isolated from Asia, the Near East, and North Africa, meaning if you want to screw Europe in terms of having accecss to technology, domesticated animals, dieses exposure ect you have to screw over the entirety of Afro-Eurasia, which is so absurdly unlikely without conditions that essentially hit the entire world that its ASB.