Leona is not the new Mariah!
Reasons: she released a generic dull album (apart from bleeding love)
Here voice doesn't have depth, soul personality if you listen to the album she get jarring and everything id on the same pitch... more like she grew up listening to the greats.
Last but not least, although leona has a lot of growth t do, she also has a hell of a lot more records to sell and a longer career before she can be compared to anything, let alone anyone.