To be sure, but if we take the 1939 Wehrmacht against the 1939 Red Army, the USSR still wins. Whether "win" means "take over half of Europe" is a completely different question.
I doubt the British and French would be too keen on the Soviets going much further than the Vistula, my guess would be that they'd push for peace terms once the Wehrmacht has been decisively pushed out of Poland, probably ones favourable to the Soviets but that keep Germany intact and independent. If the Germans don't accept then the British and French will abandon them to their fate, Hitler might want to keep on fighting but at this point militarily sane minds like Halder would most likely replace him. If Hitler remains in power and the Soviets continue to advance into Germany I can see the French moving in to occupy as much German territory as possible after Berlin falls.
Last edited: