I'm not saying they're one in the same, but they're pretty much what High Elves were in their past society.Their cultural heritage is relatively the same, adapt in the arcane, love for magic, superiority complex. Sorry if that didn't click with you from my original post.
I know they aren't one in the same, but Shal'dorei and Sin'dorei are basically the renmants of High Elven society while the Elves of the Silver Covenant are kind of something else entirely. I don't think they get enough proper exposure and development as a race to warrant a description of what they're now.