Well they both beat Wlad and just 17 months apart. The consensus is that after years at the top, Wlad took his eye off the ball and took Fury for granted. Fury did superb, though. 17 months later Wlad will have lost that complacency, had his hunger back, and he got beat up by a novice AJ. I think those are equal wins.
Now Wilder, great puncher, terrible boxer. He has lost nearly every round he has fought against top 10 fighters. Of which there are only 3. He is a paper champion, whose career defining win was against a 40 year old with a heart defect who had no significant wins on his record. Wilder isn't an 'A class win' because Wilder has nothing of note on his resume.
I agree that outside of Wlad, AJ, Fury, there are no other A class wins on any of their CVs. AJs B and C wins, are way above Fury's C, D and E. Fury doesn't fight top 20 fighters, other than his 3 title fights. AJ doesn't fight outside of the top 15 and hasn't for more than 4 years.
But this discussion just highlights how his record is not looked on through the same eyes as Fury, just like Raducanu is questioned for her integrity as a brit, like Barnes was years ago, like Lennox was. Hamilton should be absolutely loved, like Mansell was, but he isn't because of his vocal stance on racism. I remember Bruno used to get called an uncle Tom because he kept quiet about racism, and instead decided to go along with the elite. It was hard on him, but it was the only we he could be a publicly accepted black athlete at that time.....I wonder how much progress we really have made since then, other than non-white british athletes will now stand up (or kneel down) for their rights.