I would say yes. It's not easy beating a much bigger man, even if the man is not as skilled as Breidis. When you take into consideration that Usyk used to fight at 200 and AJ weight 250 for some of his fights... that's a lot to overcome.
AJ > Breidis AJ is much larger man and had his thousands of citizens during the bout. That makes Usyk's victory "far" better.
Yes and the most important reason for that is because Joshua is a very known boxer around the globe. Usyk was not considered an underdog against Briedis. Now suddenly all randoms that watched the fight will become huge boxing experts and fans of Usyk just because he beat up the most famous HW currently