Of the two, i would say France is by far the worse. From Vietnam/cambodia/laos to Africa, their colonies are the worse of today. Especially french colonies in Africa(where i have visited and even briefly lived in some). Many people don't know this(since they always focus too much on the anglo-saxon 'evil/hegemnonistic' U.S/U.K world), but France is by far the worse european coloniser. all french speaking african colonies still use the french currency even today(the Francs CFA). All central and west african french colonies(about 20 countries) still use this currency which is printed in France and shipped to their subjects, worse still, they are all required to keep their financial reserves with the french treasury. This is unheard of, even britain never did such a thing. They intervened openly/directly to toppled and arrest Laurent Mbagbo(ivory coast president) because he wanted to pull out of the the colonial French currency (the francs CFA).
France is still the only former(more like current.lol) european master who still has military bases/troops in almost all its former colonies, from Cameroon,Gabon to senegal/Djibouti etc....to keep its subjects in check. They woulkd have still been in Vietnam today, had the Vietnamese not fought a self destructive bloody war to kick them out.
I wont go into too much detail here, since i dont want to derail this thread. So read this if you are interested. Then you will know that Britain is/was a colonial angel compared to France.
African Monetary Union Stirs Criticism of France - Businessweek
Excellent analysis.