I was reading the Wikipedia article on the Senate of Canada. Based on that, Canada is divided into four principal regions that all have 24 senators; in addition is Newfoundland & Labrador and the territories with a total of nine senators. The regions are described as a counterbalance to the two large provinces of Ontario and Quebec: Western Canada of "B.C., Alberta, Manitoba, and Saskatchewan" and the Maritimes of "Nova Scotia, New Brunswick, and Prince Edward Island". However, Wikipedia, did not describe whether the regions actually manage to counter-balance the two large provinces as evidenced by the voting record.
While not directly relevant, I've read some criticism of the Senate as put down by Bill Rowe, a former Leader of Opposition in Newfoundland & Labrador. Rowe described, e.g., Alberta voting because of their oil resources more than for a common regional background with British Columbia.
So, do Senate voting records suggest that the regions as presently included in the Senate allow sufficient representation for provincial interests—in other words, do the provinces that make up the regions actually vote together with each other (and do their modern interests even align)?
I'm asking also because this seems a relatively uncommon way to make up a lower house, giving precedence to some regions but clearly not counting all provinces as equal to each other, while both American and Australian states are equal in the upper house.
I haven't focussed on the territories as they don't have an 'equal' basis compared to the provinces with respect to numbers of senators, and they're not intended to equal out the other areas.