All there of them tried to sing some of the songs in their own way by adding some variation to the original, aur apne style mein gaan e ke liye bahut-sara taareefein bhi batora. Sunne mein to maja aya hi. Even they were told to have surpassed the original singer and composer.
Poor Abhrokanti! Remember how he got scolded and criticized for adding extra variations/murkiyaan, being sarcastically called "Ustadji"! He was way ahead of his age.
My point is, do you think by adding few extra variations here-there to a already beautiful and well-sung composition one can overshadow the legends of the music industry?