I think there tend to be differences year to year just in looking at large geographic biomes of the country. Things on the Prairies tend to be similar in terms of concerns and influences. That often differs from other provinces such as British Columbia, Ontario, Quebec, and the Maritimes.
We're a very regionalized country, so it's hard to make sweeping statements, but weather patterns, cropping practices, use of pesticides, and the sheer number of colonies certainly can vary differently within Canada regionally. All of these factors, I think, contribute to success outcomes and perhaps to the development of better management practices to improve overall survival and health of bees.