Perhaps you could read of Praga, Vinegar Hill, Seringapatam, Jamaican Maroons atrocities for comparison.
Whatever the nation, treatment of rebels was the same.
The sole difference is that Napoleon wrote orders for the harshest measures, which were usually not applied, while traditional kings did not have to write anything, slaughtering mobs and executing leaders being a routine for monarchies, each rebelion being a crime against the sovereign and God.