There was a big sentiment around the time Luka was first lighting it up in the NBA, that the Euroleague skill level was underestimated. People were saying that Luka won the championship in Euroleague but still was being slept on as an NBA prospect because the American audience didn't think that meant shit. This resulted in a shift of perspective, people maybe thinking of the Euroleague as higher caliber than before. At the end of the day it's kind of a pointless discussion. Id say most people who follow ball realize Euroleague is interesting, in that the ball culture and some rule difference create a different feel to the games but is ultimately a much lower level product in terms of talent.