I feel that the Goth family, specifically Mortimer's ancestors, are very "old money". They have a legacy that goes back hundreds of years and have been around forever. I feel like Mortimer kinda broke tradition by marrying Bella for love - even though she's hot, she's not a trophy wife and my headcanon is that Mortimer comes from a very "proper" family. Bella is obviously smart and spirited, I feel like her looks are more about being a sort of female James Bond. Bella and Mortimer are obviously in love, very Gomez and Morticia Addams.
The Landgraabs, while canonically going back a few generations though the games, are more "new money". They're into new business ventures, they built Foxbury university, they're modern. I think Nancy must have married Geoffrey for love, as he's neither rich nor smoking hot. Maybe he's just a really great guy? I guess she has enough money and looks for both of them (she had plastic surgery, after all). Or maybe she accidentally got pregnant with Johnny and had to marry Geoffrey so it wouldn't cause a scandal.
I like pairing up Cassandra Goth and Malcolm Landgraab in my games to create some tension between the families, but I also had one game where I randomly went to play as the Goths a few days into a new save, and when I looked at Mortimer's relationship panel, he was somehow very in love with Nancy, so that created some drama. (I assume MCCC did that)
