Shermans now pack a bigger anti-armor punch. In CMBB, the 75mm L/38 gun had the following penetration stats using a APCBC round:
90/72/40 (100m)
83/66/38 (500m)
The same gun in the demo Shermans (M4A1 and M4A3) now has these stats:
104/82/40 (100m)
96/76/38 (500m)
So the Shermans now have a much better chance of killing a StuG (80mm front armor), and apparently, a theoretical chance of killing a Tiger I from the front.