Take two armies with equal quality soldiers (which obviously wasn’t the case in WW II) and spend an equal amount on German tanks and Soviet tanks and the latter will beat the former.
WHAT stupidity!
The Russian military in WW II wasn’t exactly run by a bunch of geniuses. Their greatest general Zhukov, was pretty much a butcher who just feed his greater number of troops and materiel into the German meat grinder until he won.
Perhaps you didn’t notice I said spend an equal amount, not provide an equal amount. The T-34 was a lot cheaper and easier to make. It was also more reliable. Given these factors, you could field a lot more for the same cost, and an army working with them would have a significant advantage all else being equal.