It would be interesting to see how a neutral Sweden and Norway would evolve psychologically if it were trust into the role of a colonizing power. I mean, in the 19th century they were light-years ahead of the rest of Europe when it came to the treatment of women, and they already had a system of 'ombudsman' to hold the powerful accountable. But how much of it would survive if after 25 years the country/countries realized that the bulk of their wealth came from the sale of Congolese coffee and cocoa and from their access to cheap Congolese ore. Would they have any problem dispatching the military to break up a Congolese miners strike? Or to 'pacify' unruly provinces?
Seeing how Sweden treated it own working class and minorities, I don’t really see Sweden having any trouble upholding their rule in Congo through military means.
My fear is that for all of its progressiveness back home, once in the Congo Sweden or Sweden-Norway would not be much different than any other run-of-the-mill colonizing country and that through some wilful mental gymnastics most of the Swedish and Norwegian population would be okay with it.
Sweden was not really progressive back home. I expect Sweden to be a pretty run of the mill colonial power which is a vast improvement over Belgium. The main difference will be that Swedish administration will be pretty different thanks to the clergy being far more integrated into the state’s bureaucracy than for most colonial powers (Germany being something of a exception), this will mean that Sweden will have far greater control on the ground and be far better able to propagandize to the population. The greater use of native bureaucrats will also allow Sweden a far more dignified exit than Belgium and will keep Swedish companies active in Congo.