The only difference between Euro spec cars is they don't have side markers in the wheel arches, and they have a speedo that only displays KM. Neither is excessively expensive to change. If you're importing to Canada you don't even need to change the speedo.
Of course the fact that they can't run on north american diesel is very difficult to change, which is why people mentioned it early on, it pretty well negates the possibility unless MINI decides to support this.
The G500 worked because it wasn't a diesel and people wanted it for the 'I drive an overpriced box on wheels that is made for serious offroading and I have too much money and want to drive it on the streets in LA'
I don't think a One D has the same appeal, but your point/comparison is otherwise valid.