Granted are more investments into Semiconductor and Quantum Computing Research, more "SpaceXs" and hence, earlier Starships. My estimate is that in a scenario where the Soviet competition is higher and it simply doesn't fall as in 1991, and continue a China like pathway, Space Technology development can be around 20-25 years faster than the one we have. Which reasonably means, strong and established private Space agencies (multiple) exist by 2000, Starship like launch vehicles developed soon after, Lunar bases by 2005 or around that, and a Mars Base by 2010s, with a Mars settlement by 2020s or the 2030s, though it could take a couple of decades more to have a thriving Mars settlement. My estimate for us, in a World without this, is that a thriving Mars settlement is likely by 2070s. In that timeline, subtract around 20 to 25 years. These also entail developments outside the Space field because Space Stations and Bases provide resources and incentives for massive Research into High Energy Physics, unlocking Nuclear Fusion Power (even the Compact versions, with the incentives and the High Energy Research possible), very advanced Quantum Computing that could be used to give us better health and augmentations, and there are many more fields where Space Technology will help.
A 20-25 year earlier developments in Space Technology means vast and cascading improvements. I like this topic.