Since we're mostly discussing about what the world would've looked like if the Axis powers had won WWII, I'll go ahead with an alternative end of the war in case of an Allied victory.
Imagine if 1st Airborne had managed to hold Arnhem, the 82nd had held Nijmegen successfully, the 101st had managed to repel German counterattacks in Eindhoven before reinforcements arrive, XXX Corps had been more successful to relief the paras and all in all, if the Allied forced had been prepared better to face the II SS Panzer Corps and the 15th Army and if the supply problems had been less severe for the Allies. Yes, I'm talking about a fruitful outcome of Operation Market Garden which would've enabled the Western Allies to end the war against Germany right before 1945.
After neutralising the V-weapons launch site in the Netherlands early October, the Allies were rushing into Germany and the Battle of Berlin commenced on 25 November. Allied supply lines were overextended and the Germans showed fierce domination to defend their capital, angered by their debacle at Arnhem. Eventually the Anglo-American force, supported by Commonwealth, Free French, Polish and Czechoslovak soldiers won the bloody battle having fought the Germans in a Stalingrad-type house-to-house combat (both the RAF and the USAAF bombed the city to rubble).
Just as the new year began, the USSR were furious over the fact that the Western Allies captured Berlin without their help or consultation. Skirmishes between both sides have broken out and soon afterwards, the major clash began in Poland, with the Red Army attacking the British, the Americans and their allies. Though the Allies still hadn't finished licking their wounds from the slaughter in Berlin yet, the Soviets had to deal with pro-Allied/anti-Communist insurgencies in their newly-conquered territories in Europe. Hell, tens of thousands of Polish and Czechoslovak troops serving in the Red Army deserted to the Allies. The staunch communists, regardless of their ethnicity, remain in the Soviet forces of course. Churchill's plan to reactivate the surrendered Wehrmacht divisions to bolster the Western Allied troops was put into action (
this idea wasn't that far-fetched actually).
Yes, the Brits (SAS and commandos could do a lot of damage create confusion among the Soviet lines
) and Americans might be better trained and better equipped than the common Soviet soldier (knowing that there were units entirely equipped with deadly SMGs and they became battle-hardened in the course of the war) but the Red Army outnumbered the Western Allied armies and air forces and had a superior armoured force. However, you will also have to consider the nationalist insurgencies in Soviet-occupied Poland, Czechoslovakia, the Baltic states etc. as I've already pointed it out earlier. Plus, imagine if the Allies had had more Comets, Pershings and Jacksons at their disposal and if the Centurion tank had been introduced earlier into service. The conflict could either result in a stalemate, or with the Soviets overrunning Central/Western Europe or with an Allied victory, depending on how far the Allies can push into Eastern Europe and the Balkans.
Loads of factors to consider here but alternative history is fun since I started reading scenarios on
AlternateHistory.com.