I think we should listen to tank crews opinions.
Germans did not call PzkpfwIV "Rolsons".
And we can't compare tanks only by its cannons. Later German tanks had 75 or 88 mm guns , Allied 75 , 76 mm or 17 punder gun. Seems similar but German 75 mm was not Allies 75. Cannon was longer and ammo was better - it means that German 75 was far more devastating than Allied.

Anyway
I remember that using air-aircraft against tanks during ww2 was not only German tactic.
Russians used it during last German offensive on Budapest into 1945 = and it worked even
against strongest cats.