I'm going to help you out.
2001 census
http://www40.statcan.ca/l01/cst01/demo62a.htmClick on province at side to see breakdowns.
The figures below are in this order: total pop, urban pop, rural pop, % urban, %rural.
British Columbia
3,907,738 - 3,309,853 - 597,885 - 85 - 15
Alberta
2,974,807 - 2,405,160 - 569,647 - 81 - 19
Saskatchewan
978,933 - 629,036 - 349,897 - 64 - 36
Manitoba
1,119,583 - 805,321 - 314,262 - 72 - 28
British Columbia is a "mixed bag" in numerous ways that the other provinces are not. The geography of BC alone is a major factor -- people living on islands in the Pacific accessible only by water, for instance. Alberta, Saskatchewan and Manitoba are essentially landlocked and do not have the geographic barriers that exist in British Columbia.
Obviously, my main point was the urbanization rate -- Alberta is approaching the urbanization rate of BC, but Saskatchewan and Manitoba are still heavily rural.
And yes indeedy do, the populations of the three landlocked provinces are way, far more homogeneous than the population of BC. They are not major destinations for international migrations. And they are not exposed to the international organized crime influences that have had a considerable impact on crime in Vancouver, which is a gateway city with international exposure and influences such as none of the other three has.
You'll also find that among the native born white folks of the three other provinces, rates of Christian religiosity are consistently higher than in BC. BC has the highest rate of "No religious affiliation" in Canada (16.5% nationally, which is bizarrely skewed downward by the 5.8% rate in Quebec; 36% in BC). Very roughly, Alberta has about 3/4 of BC's population, but very nearly as many Protestants.
Yup, some of that is due to ethnic makeup; some of it is due to differences within the white native-born population.
Essentially, BC has a very diverse population -- heavily urban, heavily cosmopolitan, ethnically/religiously diverse, high proportion of born-abroad, considerable exposure to international influences, and also remote communities scattered around the landscape. Alberta's population is much less diverse in terms ethnic and birth status and less urban. Manitoba and Saskatchewan are several notches lower in terms of diversity and urbanization, and international exposure.
I do hope that helps.