Is the sapphire of the Apple Watch Series 3 better than glass?

The base Apple Watch Series 3 comes with the same ion-strengthened glass that the iPhones use. The pricier Edition model has sapphire crystal instead, which is harder and more scratch resistant. But are all sapphires the same? JerryRigEverything set out to test this, using a $300 Tissot watch as a control (which also has sapphire crystal). The results? Well, here's the video and there spoilers are below it. While Apple is indeed using sapphire, it's not the best quality. Impurities make it more fragile than the sapphire crystal used on a typical Swiss watch. The same test...