It's not clear to me which version of this NPC I should install. Based on the description of each mod, they sound independent, however I've had issues in the past installing both.
Verr'Sza BGEE includes content for BG1EE and SoD (and should be installed on BGEE, from what I know), Verr'Sza BG2EE is for BG2EE and it should be installed on that part of the game. The combination of both mods gives you content for the whole EET.
However, I do not use EET myself; compatibility is usually provided by those who actually use that platform, sent to me, and then I include the new files / lines and release a new version.