That Twilight is obviously the Twilight from this world, since it couldn't possible he the Twilight from the pony world, since the Twilight from the pony world doesn't go to Crystal Prep or wear glasses!
あのトワイライトは　元から この世界に居たトワイライトね だってあの子がポニーの トワイライトのはずはないわ ポニー世界から来た トワイライトなら...