Mariah did not tour much in her career, I wonder why that is hmmmm. Madonna, Whitney, Celine, and Janet have toured waaaay more than Mariah, so why does Mariah sound so different from the 90s?

Besides, Whitney will always be The Voice, she is the most respected vocalist of all female singers. Mariah may have the edge in the numbers, but Whitney wins the respect. Mariah's career was built off Whitney's formula, so Whitney is Mariah's teacher

Whitney is also the bigger international star, the only bigger female international act then Whitney is Madonna. While Mariah may have one or two Asian countries on lock, Whitney has entire Europe over her, and Africa, North America, and even Middle East, and South America, that explains why Whitney has sold just as much with less albums