she can't do arial like Sanaya,
she can't synchronize well with her choreo just like Sanaya,
She is not versatile like Sanaya
she doesn't remember steps like Sanaya.That is the difference between Shamita and Sanaya.Sanaya,despite being a nondancer has improved so much and attempted more difficult dance forms and lifts.This is called hardwork!.There is not even 10% growth in Shamita's journey or any improvement in her dancing and somewhere judges are responsible for this bx they keep feeding her laddoos of marks.
Sanaya is being underscored bc they want her fans to vote more.They want to make money fron her massive voting.