My family has been here generations. I'm married to an immigrant, who's from a showy culture, too. While I save for retirement, it's expected that they will all live with their children when they retire. So I find that to be the biggest divide. Of course they can afford the Mercedes when there's nothing in the retirement account.
Nobody in my family would say something that forward about a car choice. So I'm fortunate I don't have to deal with it. But I suppose I'd say their cars are really nice for them, but a Honda is "real" enough for me. Relatively eco-friendly, minimizes money sunk into a depreciating asset. And I like to focus on my investment portfolio instead.