Who knows. Maybe they're using Dragontrail.
I personally use screen protectors. I generally prefer going with tempered glass protectors only because they last longer and protect the screen better. I had the glas.t on the original Note and Vitreo on the Note 2. Way better investment and protection. Also have no input issues whatsoever with the Vitreo, but a little issue with the glass.t.
Still have a beautiful screen to view regardless.