I hail from Rajasthan. Yet when I heard Karu's singing I was mesmerized. And I found the following qualities in him
1. he was confident and has great screen presence.
2. He was very comfortable while performing his songs.
3. very media savvy and has very positive attitude.
4 He always chose the most difficult songs on stage.
5. He made all the judges and guests jump from their seats. (of course from his singing)
6. He was the complete package for any Competition.
And sandeep is a good singer, but seems very uncomfortable while performing. He is humble and shy. He may not present himself well in front of media. At times I feel his smile is plastic. He may become excellent playback singer, but will not deliver magic on stage.
Again I am saying, I am from same state where sandeep hails from. yet I prefer Hyderbadi Biryani over my very own Bikaneri Namkeen.