Interview Discrimination?

Final year undergrad here with visible vitiligo on my face.

Reached the final round of interview for an in-house consulting firm.

All interviews went really well.

Come with 4 months of internship experience, 2 of which are a niche but big consulting firm.

Somehow didn't get selected.

A girl with less merit (on paper) and no consulting experience did.

Guesses are that the vitiligo was a dealbreaker.

A. Please be brutally honest, is it actually going to be a dealbreaker?

B. What could the reason for the other candidate being selected be? (Better interview performance, diversity hiring, etc.)