With the Battle of Kursk only 7 months into '43 the plane set would be virtually the same. Most of us history /flight sim nerds know that the turning point of the war was Kursk, not Stalingrad and the air battle that raged over the battlefields was also the largest in history as was the tank battle. Maybe in an add-on or expansion but the significance of Kursk as an air battle far outweighs Stalingrad for both sides. Just MHO.
"Stalingrad was the end of the beginning....Kursk was the beginning of the end"