What's the difference between #Haftarah (S) and Haftarah (A)?
To any of my friends who are here from Twitter, I do a lot more giyurposting here, sorry

@epistemophagy presumably nusach ashkenaz and nusach sephard (which, confusingly, refers to ashkenazi jews from central/eastern europe who over time adopted some of the sephardic traditions - sephardim have a bunch of nusachot of their own lol)

[edit: ok it makes much more sense to be what the other commenter replied, i honestly know jack shit about most haftarah stuff]

@flowers constantly asking questions about Jewish tradition, call me Nicki Minhag

@epistemophagy
different customs — Sephardic vs. Ashkenazi, in this case

this article lists the abbreviations used and also how the different traditions structure their haftarot:
https://en.wikipedia.org/wiki/Haftara#List_of_Haftarot

(caveat: i am not jewish, i'm just occasionally good at research)

Haftara - Wikipedia