BaS absolutely exists in a different universe from the one we played in Infinite because Anna doesn't die in the reality we know. The only perspective that matters in the story is Elizabeth, and Ken Levine has confirmed that she's one and the same as the one from Infinite, which means she carries all the memories of what Comstock was capable of, including the memories of her being brainwashedMore than anything though, Elizabeth letting him die is essentially a way of tying up loose ends by killing off a remaining straggler who escaped the baptism purge at the end of Infinite. Although admittedly Elizabeth is very cold/cruel in her manner of disposing of him, the killing does have a purpose, which is to erase Comstock wherever he
SPOILER [SPOILERS] Burial at Sea episode 2's ending I'm dissapointed, sad and not satisfied at all with the ending.
MyGr8.