Many things - mostly very late aviation

The Red Air Force had no chance to handle the Allied heavy bomber offensive.
Their armies would have withered on the vine as heavy bombers

smashed their supply lines and airfields. No tank fights well without gas.
Both air forces were combat experienced, with a probable edge to
the USAAF in training and doctrine [1]. Put the US had the P-80 coming
on line, and the Meteor was ready for series production as well. The Soviets
had a few dozen rocket interceptors in service, but not much prospect for a
front line jet fighter anytime soon. Add airborne radar to the Allied
technological advantage. Given air superiority there is every reason to
believe that the Soviet tank corps could find themselves

trapped at the end of a long and vulnerable supply line and without air cover.
At least the Germans had the advantage of short supply lines. The

Soviets could even stand to lose Siberia to American, British and Commonwealth
troops intended for the invasion of Japan. Two million men thrown against the
troops holding a static front against the Japanese. I give the honors to the
Allies, with all of Eastern Europe and Siberia liberated by English speaking
troops.

That said,

I must give the Red Air Force full credit for an excellent job in the role for
which it was designed: close air support. I've recently acquired a healthy
respect for the Reds in the air, I've been playing a lot of a Russian made
flight sim. Even given a certain natural bias, just from the different
perspective, the Russian aircraft perform well
in all roles -- at least by the end of the war as the Luftwaffe had a
notable advantage through 1942. They had an excellent ground attack plane in
the Sturmovik, and fighters to escort it at low level and some to go up for
air superiority and go after the mediocre bombers the Germans had.

But nothing to cope with hundreds of P-80s in service by the end of
1945. And thousands in 1946.

[1] I use doctrine to mean the rules, procedures, shared assumptions and

philosophy of a military service as a finghting entity. That covers the range
from line and column tactics to modern armored Maneuver Warfare, it's just
what you call whatever it is that they actually do.

> The Red Air Force was designed to provide close air

[quoted original message omitted]

Actually, in the appendix of "the Rommel Papers", Manfred Rommel recalls his
conversation with his father one night about the eventual conflict between the
Soviets and the rest of the Allies. Erwin Rommel outlined exactly the same
kind of plan as you said about the Americans and British using their air
superiority to defeat the Soviets.

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"Computer games don't affect kids, I mean if Pac man affected us as kids, we'd
all be running around in darkened rooms, munching pills and listening
to repetitive music." - Kristian Wilson of Nintendo, Inc.  1989
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[quoted original message omitted]