This is a topic I so much enjoy. I've been listening to a lot of marriage talks lately, almost like I'm preparing for mine. Lol. Truth is mo perfect marriage exists. No perfect couples too. The only thing I know that exists is perfect communication/understanding just as @beautifullyyou said above.
Just a matter of understanding, if both partners can understand the fact that they are brought up from different bar grounds and respect one another I believe there would be no problem.