I don't think Danny has come close to "earning" the same money Quincey got. People can argue whether he's just as good or better all they want, but that's not how contracts get done in the NHL at this stage of his career. If Danny was a star player and clearly better, it would be a different story, but the truth is he is simply one of the guys who is developing and who has some promise and could very likely end up being the better player.
Quincey put in many years to get to UFA status, which is what many players work towards and often only get the opportunity to experience once in their careers...that's when they cash in. If you are Danny, after putting in 70 odd games in NHL and looking to cash in the same way, then I'd be more than a bit annoyed.