I mean, both are actually really good singers. But Leona is more willing to use her voice, whereas Nicole seems more interested in making music that doesn't put you to sleep (even if her makes her sound about as talented as Katy Perry).
They both have great voice's so I don't know why your trying to shade Nicole. I picked Leona because she clearly has a wider range and she sings effortlessly.
Leona is overrated. Boring, dull vocals. No personality in her vocals. Bland tone. No power at all. Weak lower register. Her only asset is her head voice. Her range isn't even that great.
Nicole is better. She has a distinctive tone. She has lots of power and chest range. Weak lower register, but she has an underrated head/whistle register. She gets a lot of flack because of PCD and her flopping, but she is a good vocalist.
You know damn well.. Nicole Sch154187dfwhathe**** could never.
Leona