If both of them are from other nationalities, the IRCC would probably send a congratulations card and a box of chocolates while welcoming them into Canada.
Probably, and math explains how such a response from IRCC would be entirely normal.
Let's pull some "fraudulent marriage tendency coefficient" out of our asses to be 10% for both western and eastern applicants. Why use the same coefficient for both? To show you it has nothing to do with if the applicant is from the east or the west.
Assume we have 100 applications from the west, and 500 applications from the east. This reflects reality in proportion (at least on an order of magnitude accuracy). So IRCC officers would have seen 10 fraudulent marriage cases in the files from the west and 50 such cases from the east. So what conclusion do they draw?
"Fraudulent marriage is likely to occur in applications from the east five times as much as it would in apps from the west. Proceed with more caution."
Is it because easterners are such horrible people? Nope. It is because there are just so many applications from them because there are just so many of them wanting to come to Canada.