re: 4
Komarov in Soyuz 1 in april 24 1967
Dobrovolski, Volkov and Patsaiev in Soyuz 11 end june 1971.
Both at re-entry (the first because the parachute did not extract properly from its birthing and the second because there was a leak in the cabin and they had no pressure suit).
4 Soviets died in space missions....and that's all.
And indeed, they are less risk averse than Americans.