Well I watched Vlahovic, and I really don't think it's a stretch to say that Aubameyang had a better season than a guy in a much weaker league who scored all but three of his goals in the 21 half of the 20/21 season. Let me rephrase it to moderate the tone though: there certainly wasn't much between them one way or the other.
Vlahovic is a very interesting player, but you'd be paying for what he might turn into in the future, not what he is in the present. And paying world class transfer fees for players that are not world class is exactly how we got here to begin with.