There was not a lot if any, and it's due to a combination of circumstances.
Number One.-Kurupt will always be an unsung legend, because, even though he's the kind of MC who spits poison everytime, the type of music he makes lack mass appeal by design, that hardcore type of hip-hop shyt that doesn't reach much beyond the underground hip-hop heads (so yeah despite everyone knowing who he is due to his affiiliations Kurupt's an underground rapper) that like that type of shyt, kinda similar to Papoose if you're wondering of an NY example (although Kurupt actually has dope albums) or a Beanie Sigel, and also he's someone who's past his prime moment of relevance and the relevance of whatever you say it's directly proportionate to whoever says it.
(Also being the guy who made the song New York New York already way back when he was at the top of his relevance and in his prime, it's redundant for him to say it now that he's way past it, wich is why, there's little reason for anyone to hype it.)
Number Three.- But Kendrick is one of those rarities that has both mainstream appeal and underground traits in his music so when someone like him who also is VERY relevant now, says it, and also reaches a lot of people when he says it, he's actually considered as a contender for being one of the greatest, because here you have a guy who can both spit and actually make great songs (like Em or Jay).
ANd Finally there's the huge difference that Kurupt didn't name call a list of the hottest rappers at the time, so he didn't even remotely press all the buttons Kendrick did with his verse.
"legendary kurupt" 
kurupt been garbage since the late 90's he's only a legend to you west coast nikkas you biased dudes gas everything from your coast and nobody cared about kurupt saying it cuz most people didn't hear it
