I don’t think the napoleonic wars are a very good comparison as they happened 100 years before the Russian revolution. You do see some parallels to later wars – the Russians being technologically inferior, or getting Poland after a war, for example. If you look at overall deaths, the French side suffered half as many as their opposition, and more Russians died than people from any other country opposing Napoleon. This still ended up being much less extreme than in WWII where I guess the one sentence summary is that, in Europe, most belligerents were spending enormous amounts of money on weapons and technology whereas the Soviet Union suffered enormous military and civilian casualties to achieve victory.