Going the U.S.S.R being given Trusteeship after WWII route, if they do incorproate it through a (likely fixed) Referendum as an SSR, their would be major geopolitical changes.
Firstly the decolonization era would be fundamentally different; with a Soviet Union that's seen to be just another colonizer it could'nt legitimately (that is the Africans won't take them seriously or think their system is necessarily good) go on about ani-colonialism, which could cause alot of colonies to gain independence later, heck it may even provide enough extra time to get Europe to convince the U.S. to go along with the plans of infrastructure and civil society building and gradual independence, which would elave Africa alot better off, however if it does'nt, then America will become the primary (and possibly only) power that supports decolonization, which would lead to the large majority of the independence movements to be aligned with the U.S., which would likely lead to an Africa that's a mixture of Federal Republics, partial-democracies and states that would be similar to Chile under Pinochet.