Cassian Andor and Obi-Wan Kenobi may be two men who eventually fight for the same side, but that's about all they have in common. The version Cassian we meet five years before the events of "Rogue One" is an outlaw sought by Imperial force, doing whatever he can to survive and stay off the radar. Sometimes that means shooting traitors before they can even think about drawing a weapon. Sometimes it requires him to scale a craggy cliff's face in bare feet, ignoring the blood seeping from his nail beds.
The Obi-Wan we follow through his eponymous six-episode prequel is also a fugitive, but one bound by his reputation as a Jedi both within the show's timeline and the audience's institutional memory. He has limits that force him to set an example, a function of knowing the character and the actor who plays him, Ewan McGregor.
