I am a novice when it comes to music and dont understand the technicalities of music. I judge by what I hear.
I think Mussarat showed his true class when he sang in the Finale in an open stadium. For me singing in an open stadium is a true test of a singer and for me his voice, his singing, his throw overshadowed every contestant or mentor who performed. As a matter of fact even Himesh couldnt match Mussarat.
For me it looked like the initial finale performances of Raja, Aneek and Musarat had its voice pre-recorded in a studio and hence dont include that in the comparison.
Lets also give the genre argument a break. With time, if any of the singers need to make a name for themselves in the industry, they will have to slot themselves into one genre eventually so whats the harm if Mussarat is the first mover.
For me Mussarat is the real champion. You rock bro!