Canadian side of lake of the…

Canadian side of lake of the woods does not need the change, the American side does, how is it that myself, as a Canadian, can catch and only retain 2 walleye, yet I can boat across to the American side and catch + retain six walleye, does not make sense. I do believe that setting a slot size is important to the fishery, perhaps 1 fish between 18-23 can be kept, anything bigger to be released...