The Ukranian economy (although currently in crisis) is much more viable.
If you take into consideration the GDP prior to the invasion of Russia, you can see that they didn't exactly live more poorly.
I've been to both countries and know it first hand about the actual standard of living.
Russia, also, has ridiculously high number of billioners compared to Bielarus and the Ukraine, which you know.... makes Russia look better on paper. But that's just on paper.
The average Bielorus/Ukrainian lives a more comfortable life than the Russian!!!
Don't just google it and pretend that this is a realistic measurement of things.
Russians (on average) live a poorer life than their Western neighbours. And it will be even more evident in the near future as Russia is practically in a stagnation while the same cannot be said about Ukraine and Bielorus.