Mot, basically there are only two new tanks, a couple of changes to some tanks that are in other sets, renames, country changes, costing changes. You know the changes better than I do. See below, I’ve list the ones I know.
I would suggest only to add the two new tanks and work on set III. Need some Panzerschreck HELP!!! with the new IS2 tank. A platoon of Panzerfaust is not enough to kill it. Defense 7/7 + superior armor. Even if it’s disrupted the Panzerfaust needs to roll 8 out of 10 to damage.
Sherman VS 17-Pounder
T-26B (same as Chinese T-26)
M3 Light Tank (same as Stuart)
M18 GMC (same as M18 Helcat)
Panzer IV Ausf F2 (same as Panzer IV Ausf. G)
Other several tanks & Vehicles rocosted