So as we all know, iPhone 6 & 6 Plus do not come with a Sapphire enhanced impossible-to-scratch screens, but something called "Ion Strengthened Glass". That being said, I'd like to refer you to this video of when the alleged sapphire glass leaked: https://www.youtube.com/watch?v=b7ANcWQEUI8 Marques Brownlee did a scratch test and explained the Mohs scale, and found that the leaked screen was not pure sapphire, but was stronger than gorilla glass by a fair margin. Now check this video of the final iPhone 6 scratch test: https://www.youtube.com/watch?v=UYJBwIhmK60 This one shows that the screens we actually got can't event be scratched by a perfectly sharp knife point. So my questions are these: 1. What exactly is ion strengthened glass, compared to gorilla glass? 2. Do we think that the leaked screen's tested in video 1 are the very same that we got on the final product? The final screen does seem remarkably tough compared to last year's. I just got my iPhone 6 today, and the first thing I did was buy an Invisible Shield HDX, but Im finding that the slight height of the screen protector ruins the perfect curve feel of the phone's edges as I use it, and Im considering going without one at all. Interested to get everyone's thoughts?