Alex is a talent in her own right and no point comparing her to Leona jus because they both Brits. Alex did what Leona doesn't have in her locker, and thats dance quite a few times throughout this years X-factor.
That shows Alexandra can perform as well as sing so she's got a good chance at doing well if the right producers, writers, choreographers and style team come together.

Her voice may not be so unique but shes got good power and a husky, raspy tone to work with so i look 4ward to what comes next.