Rather, my primary tank-related claim was that the USSR was producing enormous quantities of war materiel, as exemplified by tanks; in 01943 they outproduced Germany almost 2:1 in quantity of tanks, and even in 01944 when Germany was catching up, they still outproduced them. The quality of that materiel was merely adequate, but it still would have represented a very significant military threat to the US's position in Europe, as it had to Germany's.
My second claim was that the USSR was in a better logistical situation with respect to Europe than the US was. I don't think that's controversial, since Moscow is in Europe, and so was most Soviet farmland and much Soviet arms production.
U.S. + British + France GDP was 7 times bigger than Russia at end of the war. Western allied air supremacy ( including a nuclear monopoly ) would have obliterated Soviet logistics.
The West had the upper hand and Stalin knew it.
I wonder if those GDP numbers capture everything relevant to military advantage. The USSR produced as many tanks in a year and a half as Britain did throughout the whole war, despite having the same GDP.
Certainly it is true that with the nuclear monopoly the US had the upper hand; what we're discussing here is what Stalin would have believed if the bomb had remained secret, or perhaps only been demonstrated on uninhabited Pacific atolls, so the nuclear monopoly would not have figured into his calculations, or been a more theoretical factor. Or, more precisely, what Truman believed Stalin would have believed.