Question on the treatment of European colonial natives in the late 1800s

My (very biased) opinion is that Britain comes out on top, but there are no gold stars for any empire (western or eastern) as all have more than their fair share of misery, slavery and exploitation.

London (NOT the British settlers) has always been broadly supportive of native rights (except in Ireland), which was one of the reasons for the ARW. This has tempered but not wiped out massive abuse similar to the Belgium Free State or the Japanese in Shanghi but didn't stop the Amritsar massacre nor the treatment of civilians in the Boer War.

 
Top