Royce is a cornball rapppity rapper who got outrapped by simple mistah FAB bars, he's just one of many rappers in this world, he's not special nor legendary enough, who's opinion on who BDK could outrap or not would hold some value.
Jay don't have Kane's voice, Jay can't flow like Kane, Jay don't have a style like Kane. In Cam's voice: how's the king of NY rocking sandals with jeans and he 42 years old?
Jay is a corporate guy who knows how to borrow shyt and stay in the game, he's got a business mindset and knows how to make money from gullible people.