What do they matter? How was Russia's treatment of Siberia and the natives there different than NA?
annual average temperature about 23 °F vs Average temperature: 55.7°F
Also, completely different time frame and technology standard.
Sibera might have given russia some value, but not remotely on the same scale as north america gave to the USA.
Could there be other things at play, like absolute autocracy dominating the Russian state even today? The Germans had plenty of space and resources had they not lost it trying to dominate their neighbors.