I had to cheat and Google it because I'd forgotten the name of the group that was used by both Lenin and Trotsky in the Ukraine during the period of instability between 1917 and 1920.
It was the Makhnovists, led by Nestor Makhno, a nominally anarchist confederation that helped defeat both Denikin and Wrangel during the civil wars that followed the revolution. It is hard to find reliable figures of the number of victims the violence directed against them and their bases of support. Makhno himself survived in exile but the numbers of his followers and supporters who were executed could easily be in the tens of thousands. Some of this was accomplished by simply refusing them coal for fuel and grain for food and fodder.
As you suggest, it's probably more a function of scale and the fact that power was not as consolidated as it was under Stalin.
The contrast of the Berlin Airlift is rather instructive. It's always astonished me that the US went out of their way to assist a beleaguered city that had been the capital of their worst enemy as little as four years before. Whereas, even these days, Russia tries to influence politics in the Ukraine by using fuel supplies as a negotiating weapon.
Nevertheless, I am equally opposed to American sanctions against Cuba, Iran, and North Korea. I'm a free-trader at heart and figure that economic sanctions hurt not only the civilians in the target nation but are also a hidden tax on corporations willing to invest and engage in commerce.