Corning Gorilla Glass protective layers are claimed to prevent scratches. However, recent claims show that irrespective of Gorilla Glass 1 or 4, your smartphone’s display is prone to get scratched.
While the protective layer on the newly launched Galaxy S6 and Galaxy S6 Edge smartphones is known to get scratched, the Clear View case that Samsung launched for these smartphones is sure to cause more damage to the screen.
These are claimed by some users on XDA forum as they report that there are tiny scratches on their glass due to minute dust and dirt particles that get trapped in between the plastic clear case and the display. The issue is not rare as users of plastic cases that cover the back of the phone will tell how the metal or plastic on their phone developed blemishes.
It is not known why Samsung thought that it is a good solution of make use of a hard plastic cover instead of a flip case. If you are planning to buy a Galaxy S6 or Galaxy S6 Edge, consider protecting it with a screen protector.