Not much I think. I had long discussions about it with my Ukrainian friends: we came to the conclusion that it was mostly the fact that Ukraine was part of the USSR (much harder crackdowns on opposition, actually including the church) - and that also built stronger ties with Russia. A lot of people forget that USSR really was a multicultural empire: you had families where in the 90s siblings abruptly woke up in different countries: Russia, Belarus, Ukraine. Post-2022 some of those families stopped talking to each other, the propaganda is stronger than the family ties. Before the situation got clarified by falling bombs, the east/west choice was much harder.

It certainly helps if you don't have a massive minority speaking Russian.