The Luftwaffe was a joke compared to the USAAF. We defeated them over their own airfields in their own radar coverage. The Luftwaffe did the same to the Red Airforce. The Soviets were unable to gain even air parity over Eastern Front battlefields until the USAAF gutted the Luftwaffe’s fighter strength. If the US had gone to war with the USSR, it wouldn’t only have more fighters and bombers by a huge margin, but far better ones as well. The Soviets would have been further handicapped by having to use low octane gas for aviation fuel as their entire supply of the octane boosters came from the US as well as a large percentage of their aviation fuel as well. The Soviets would have had a short window of relative equality in mobility until the lend lease supplies ran out and the poorly maintained American Studebaker trucks the Red Army depended on began to breakdown in large numbers. Remember, the instant combat with Soviet forces starts, all lend lease stops and the Soviets are only left with the small amounts they have stockpiled. In 1945, the Soviets couldn’t even feed their own army, let along their civilians. Starvation and disease would quickly wreck the Soviet Union allowing the Western Allies to walk in and pick up the pieces just as they did in Germany.