Silent flaws or vengeful reclaiming?
When general play style doesn’t bother you too much, it simply comes down to your preference. Do you want to indulge yourself a bit deeper in Corvo’s story, or are you more interested to see how Emily compares to him?
Corvo, while fully voiced in Dishonored 2, is still rather silent and has grown a bit more seasoned following the events depicted in the original. His abilities have evolved slightly, yet he’s still the character you’ve come to love back in 2012. On the other side of the spectrum, there’s Emily, who is going on a vendetta to reclaim her rightful throne, which gives her story arc a resemblance to that of Corvo in Dishonored.
Their stories intertwine, mind you, but depending on who you choose, you will experience it quite differently. Corvo still largely fulfills the same role he did in the first game, yet Emily can take matters into her own hands now and vent her anger herself.
Pick Corvo if: you know him, and you like that he hasn’t changed much. His story gets a bit more depth this time around, fleshing out a character you’ve already embodied before. You like to stick with what you know, and maybe you’ll give Emily a shot in a second play-through.
Pick Emily if: Want to see a story about how Ttagedy has shaped this young assassin, setting her on a path of revenge and justice that’s similar to Corvo’s story in the original Dishonored. You want to explore someone else’s story first before delving a bit deeper into Corvo’s life once moreover in a second playthrough of Dishonored 2.