For my benefit I decided to treat "Lollthsworn" as shorthand for "following the traditional Drow lifestyle and outlook", living in the Underdark (Menzobezerran is just one of tens of Drow cities) and worshiping the alt-good Elven deities. My first EA longer play was with a Paladin follwing Vehrun as he a boy Drow.
In same manner I see "Seldarinesworn" as "nonfollower of Lollth and her brood and all that goes with it" and (usualy) a Surface dweller, not necessarily a devotee of Correllon and Friends. Drizzt followed Melikkiki (sp?), 'rite?
Viconia is an interesting case - callous and cruel making Lae-zel come across as a wide eyed innocent girl scout - and follower of a goddess next to which Lollth looks "good" (if you squint a bit).
In BG3 terms Viconia would be "Seldarine elf" Cleric of Shar.
Surface Elves - regardless if Pale, Greenish or SmurfBlue - can be Chaotic or Neutral Evil Class A assholes too

- imma looking at you, fangy boy!