(´･_･`)

-> Comic Jason is brought to the world by Sheila, an awful excuse of a mother, to then be raised by Catherine and Willis—say what you will, those two were the best parents Jason could've had in their living situation. Willis might've been a criminal, but it's pointed out many times that he did it only for his small family. He loved them both, no matter what kind of man he was. Catherine had her flaws, she struggled with addiction and regrettably pulled Jason into dealing with the consequences. But he remembers her well.

-> One of the first things we see Willis and Catherine do in AK: Genesis is try to sell newborn Jason to Maroni. Sheila doesn't exist here. Catherine and Willis have both turned into awful people due to their living positions. Jason himself narrates, Having kids won't save a marriage.

-> When Jason is caught trying to steal the Batmobile's tires, fully aware of who he was stealing from, he could say he brought it upon himself. He's around eight years old.

-> When Batman literally drops down unconscious next to Jason in the alley, Jason is immediately and, not of his own want, doomed into his mess with the Joker. He's fifteen.

-> Jason's caught by the Joker while trying to help his mother.

-> Jason's caught by the Joker while trying to help Bruce.

-> Jason's whole tragedy revolves around his death. He's somewhere from 12 to 15. A long time after it, both Dick and Alfred need to convince Bruce into letting Tim, a couple years younger than Jason, become the new Robin.

-> Jason is deliberately left alive for over a year to be psychologically and physically tortured by Joker and the other Rogues. He's 17 when it starts. Only six months into being missing (by Bruce's unstable mind, assumed dead), Bruce of his own accord lets Tim, a couple years older than Jason, become the new Robin.

-> Jason, braindead after coming back to life, is picked up off the streets and (dare I say) groomed into being Talia's perfect revenge on Bruce, he's 15-17.

-> Jason, having escaped the god forsaken torture room in Arkham, stumbles upon Deathstroke and sets fate in his favor by persuading Slade into helping him plan Bruce's murder.

-> The Joker is alive. Nothing in Gotham has changed.

-> The Joker is dead. Nothing in Gotham has changed.

-> Jason's relationship with Talia is complicated. But, ultimately, he sets a path for himself back in Gotham, deciding to control crime instead of fighting it—he goes through a lot of mental turbulence when he comes back. He thinks of killing Bruce at first, only later deciding that he wants to make a point by making him kill Joker.

-> Jason has one objective he follows straight up: murder Bruce. If his own murderer wasn't there to be killed, he would go for the bystander.

-> Bruce slices Jason's neck with a batarang when he's about to kill the Joker.

-> Jason shoots Scarecrow when he's about to kill Bruce.

Such seemingly small changes in an origin can change the character so deeply at the root of their actions, even if the actions themselves seem similair. A lot of thought went into the action-reaction process in both versions of Jason, which is something I like to point out whenever the fandom decides to make him painfully shallow again.

...tldr: