But, Graves added, “the chances of us replacing him with a guy as good or better is very slim.”
Now there is no way to be certain, but there are no indications he has attempted to contact Chidi so he mustn't think Chidi is as good as KVB.
Actually, the Cards had contact with Chidi relatively early in the offseason, so I think the only thing you can take from Graves' statement is that he doesn't think we'll sign him. No more, no less. To say Graves and the organization doesn't think he's as good as KVB based on that quote is speculation.