The French, British and Russians all had better tanks than the Germans in 1939- 1941.
The allies also had a vastly superior number of tanks.
So the “ban” did work. The allies just forgot about superior tactics, training and leadership.
Actually those vastly superior early war tanks theAallies had did not have radios, the German tanks did.
The other thing the Germans had going for them was how Stalin had purged the Red Army of its best generals because they were a threat to his regime and because he didn’t like their politics.
Just like how Obama has replaced a generation of effective military leaders with homosexuals, lesbians, and racially sensitive types who don’t know a muzzle from a breach.
And radios. Germans had the neck radios that allowed better coordination.
Maybe with the exception of Patton.