“What Is Your Nationality?” vs. “What Nationality Are You?”: What’s the Difference?

The difference between “what is your nationality?” and “what nationality are you?”

• "What is your nationality?" is more formal and polite.
• "What nationality are you?" is more direct and casual.
• The two phrases can be used interchangeably in most situations, but "What is your nationality?" may be preferred in more professional or formal situations.

What is the definition of “what is your nationality?” and “what nationality are you?”?

Which is the more popular variant on the Internet?