When Hanzo one-shots you coming around the corner he has spammed it down and it was timing.. when Widow one-taps you coming around the corner she was sitting there camping it…
Hanzo has a limited ability to get around shields for example and a way more difficult to hit window of getting lethal shots that have travel time through to the enemy backline.. Widow grapples up and has a hitscan that can delete a squishy when jumping up.
Widow’s reaction time is based on the player reacting since charge fills up fast and never drops unless unscoping, Hanzo has to draw his bow and has Travel time for his arrows..
Widow is equally lethal on long range and even when jumped on if she reacts fast enough can instant kill a flanker. Hanzo can also instant kill a flanker but because of his arch and travel time lacks the same lethality on long range outside of spam.