The Canadian S23 Ultra is Dual SIM, one physical SIM & one eSIM. Not sure what advantages you think you'll have with the international variant. You won't have any warranty, if that matters to you.
Unless Samsung has changed their policy.
Overseas Product Service Policy
Any product purchased outside of Canada (such as a direct overseas purchase) is not covered by Samsung Electronics Canada’s limited manufacturer’s warranty. The product may be covered by a warranty applicable in the country of purchase.
If repair service is requested in Canada, it will be considered Out-of-Warranty and, if the product is deemed repairable, will be repaired at customer’s sole cost and expense.
The repair service process will be as follows:
You will be charged a repair cost and repair time can be longer than unusual
Detailed cost and estimated repair time can be confirmed at a Samsung Authorized Service Center
All products will require verification and a determination whether it can be repaired in Canada
Samsung Electronics Canada and its Authorized Service Centers reserve the right to refuse to repair the product at their discretion for any reason whatsoever
Repair service may be refused due to the following reasons, including but not limited to:
significant differences in product specifications, functionality, features or otherwise between a Canadian product and the product purchased in another country
differences in the usage environment such as signal, device connections power supply, bandwidth, voltage, etc.
Non-genuine Samsung products
Customer misuse or abuse
Lack of replacement parts, tools or know-how
Samsung Electronics Canada and its Authorized Service Centers do not guarantee that following the repair, the product will be fully functional according to Canadian specifications or to the specifications in the country of purchase and disclaim any warranty, liability or damages associated with such repairs."
And seeing as how you can't purchase the international variant from Samsung Canada, or any of the Canadian Carriers...