The Sherman has:
-reload 0.3s slower than P4 (OST.Version)
-6 scatter angle against 7.5 for P4 (OST.Version)
-20 less frontal armor and 10 less rear armor than P4 (OST.Version)
-10 less penetration far but 5 and 15 more at mid and close range (AP shell) than P4 (OST.Version)
-4 AOE (HE shell) against 2.5 for P4 (OST.Version)
-A crew to repair any damage (and critical one) anywhere at any time on the field
-Moving accuracy multiplier of 0.75 against 0.5 for the P4 (OST.Version)
-Non-doc smoke canister
All those great stats while costing a bit less than a regular P4 (OST.Version) and much less than the P4.J of the OKW.
Feel free to check those stats:
https://coh2.serealia.ca/#29