If the Kaiser wins WW1, no Nazis in Germany and (possibly) no Bolsheviks in Russia.
If he won quickly enough. The Tsar abdicated in February, 1917, Lenin arrived in April with a $10 million war-chest courtesy of Max Warburg.
But definitely Bolsheviks - the revolution happened largely because of the Czar's military failure against Germany.
The Bolsheviks in Russia came to power because Germany defeated Russia in WWI. If they had defeated France and Britain, they would have put in similar governments into France and Britain.
Depends how you define “win”. Some sort of outcome that would have simply pushed out the aggressors France and Britain?
The Kaiser won WWI against Russia, and used German troops to install the Bolsheviks.
The price: Finland, Latvia, Estonia, Lithuania, Poland, and Bylorussia.