^ with Ellie and Abby, you're on different paths, so that's why you might get a different feel between them.
Ellie is on the course of revenge and there's a lot of blowback and collateral damage.
for Abby, she's on a path of redemption - she's not feeling the satisfaction around killing Joel, and her nightmares are still there. so, she ends up helping a couple of kids.
she doesn't even know all she's lost to Ellie until the end, likely because it would throw a wrench in that course of progression.
we only see glimpses of the Abby gunning for revenge, the one who pushed Owen away (like Ellie did Dina), who Mel called an asshole, who became Isaac's top "Scar Killer", etc. through flashbacks; all the stuff that she found wasn't worth it, same with Ellie.