They are and quite frankly, always will be, the standards to which others are held to.
Dick Grayson, when he donned the Robin costume, became a first in comics; the teen sidekick.
Soon, he was followed by others but none had more of an impact than James "Bucky" Barnes, sidekick to The Sentinel of Liberty, Captain America.
The years passed have brought great changes to both.
Dick Grayson was allowed to age, eventually becoming leader and co-founder of his own team, The Teen Titans while also becoming a skilled crimefighter, martial artist and master detective. Deep divisions formed in the father/son relationship of Batman & Robin, prompting Grayson to embark on his own path as Nightwing. Following the recent death of Bruce Wayne, the time came for a successor and the choice was a clear and easy one: the student has become the master, leading a new Robin on a path pointing towards adventure.
Bucky was the ultimate Marvel sidekick, smiling, full of promise. Bucky, while fighting The Axis with The Captain, went on to form his own group of junior crimefighters, The Young Allies. At a crucial point towards World War II's end, Bucky and Cap, in an attempt to stop a Nazi experiment, sacrificed their lives in doing so. Bucky was given an honor few comics characters in death received: he was allowed to die and stay dead, a hero. That was until The Winter Soldier Saga where we learned that Bucky had never died and had spent The Cold War years as a pawn and assassin in the thrall and service of the Russian government. Bucky with help from Nick Fury and Iron Man was later liberated and set on a path that led towards what was once theunthinkable; Bucky Barnes living to become Captain America.
So, Second Printers, knowing what's become of these two former sidekicks turned mantle bearers, in a knock-down-drag-out, who would walk away "The Man?"