I think it's likely that the Sherman's penetration/AT is roughly at T-34/76 level with higher rate of fire. The Sherman 75mm was roughly equivalent to the 76mm IRL, too.
The shermans in the video knocked out the P4 from the rear. Also, in the video you can see that they cost 120 fuel.
As far as armor & gun go, I see them as in the middle of the mediums:
T-34/76, Panzer IV, US Sherman 75, Sherman 76, T-34/85.
Did anyone notice how effective the Sherman was against a p4? Maybe a little to powerful for a tank that's suppose to be "effective against light vehicles and infantry" (as said in description).
That's a lot of units for US, Micro nightmare.