1. Raja has a musical sense, he is very well aware that it is very easy to sing songs which have been sung by others, thus nearly all contestants try their best to copy the original song as much as they can. Raja has never tried that, and always gives his own touch to the songs. He himself adds alaaps, variations, high notes etc into the song.
2. Raja has a very unique voice. Uniqueness is what really counts in the industry if you wanna be famous. If you don't believe me, look at singers like adnan sami, himesh reshammiya, kailash kher, kunal ganjawala, they all became famous because of the freshness and unconventionalness in their voices.
3. Raja makes a song his own. Sometimes when you listen to a song sung by the contestant and the orignal, it is hard to find a difference. Some people here may think it is a compliment for the contestant, but they are ruining their own chances of getting offers to sing in the movies, because a music director will hire the established singer, not a contestant who may sound very similar to him. In case of Raja, because of his different, somewhat husky voice, he never sounds like the singer who has originally sang the song.
4. Others may be technically better singers, but that does not count in the industry. What counts is the feeling, movie songs are almost always related to the storyline, and lipsynced by the actor, and keeping in mind the feelings of the character in the movie, singer has to portray that feelings/emotions in the song. Nobody in the contest is better at singing from the heart, with feelings than Raja.
Again, please vote for Raja. He has to win. This is our chance to make a DIFFERENCE, if anyone else wins, than it is the same story as what happened to winners/contestants of sa re ga ma pa 2005 or other realities show. I believe RAJA is the only reality show participant that has potential to make it BIG in the industry.