For some reason Sunset doesn't realize that Twilight is the new ruler of Equestria.

are we sure that is not celestia looks like her just purple and with a different cutie mark

"To be honest, Twilight, you kind of look like a cheap Celestia knockoff..."

"One more word, Spike, and I'm gonna blast you to the moon!"

"... see what I mean?!"

" ... ... "

""

Sunset, shouldn't voice alone tell that it's Twilight and not Celestia especially when you know what they both sound like when they talk?