I have both. I actually fly the Mini 4 Pro more, especially now that I have the new RC Pro 2 controller for it. The Mavic 3 definitely has a better camera, but the Mini 4 Pro's camera is still pretty amazing. I like the stealthiness of the Mini...
I am a Canadian and thought about how to get your drone and accessories across the boarder. In the case of the controller pack up your camera bag and leave some space for the controller, you will have to leave the packaging in Canada especially...
RC Pro 2 is still in short supply everywhere because they are needed for the Creator Combos. I doubt you can even find one in stock anywhere in Canada.
https://dronepoint.ca/products/dji-rc-pro-2...