Unfortunately it is not true.

Citi only distinguishes different Categories - Personal and Business. Within each category, it treats all brands the same.

If anyone has spent some time reading this thread, such question has been asked at least a doz times and correct answers either by prior knowledge or by current experiences also have posted many times - that is, all brands of personal cards are treated as PERSONAL Card, ditto for business cards. That is why people applied 2 personal cards back to back within minutes to avoid the "first customer only" denial.