I definitely didn't want either character to die or really "succeed" over the other, but I'm gonna go with Abby. She still lets Ellie live twice, and her half of the game is more varied, more exciting, and has better sequences and set pieces. The sky bridge, getting rescued in the forest by Lev and Yara and desperately fighting infected to escape, the quarantined hospital basement with the Rat King boss fight, the sniper encounter with Tommy, fighting through the war zone in the Seraphite Haven, and eventually fighting Ellie like David from TLOU1... All so, so awesome. Ellie has some great sequences too like the underground segments with the Shamblers on Day 1, the boat traversal on Day 3, and the incredibly tense fights against the Seraphites and WLF on Day 2, but a lot of her sequences aren't as thematically inspired by the story or as emotional as Abby's sequences. The first fight against the WLF as Abby after Yara dies is a pretty guerrilla-warfare style Ellie-esque encounter, but the context and momentum of the story leading up to that part as Abby give it a totally enhanced flavor.