What is the new “Power Sapphire” crystal used on the Tactix Delta Solar?

I apologize that this question is in the Fenix 6 forum but there isn’t a dedicated Tactix section, so I figured I’d ask here. 

I’ve been searching for more info on what makes “Power Sapphire” on the Tactix Delta Solar different than “Power Glass” and non-solar sapphire?  So far I haven’t been able to find any information on the web, YT, here, or on Garmin’s site.

Has the clarity compared to previous sapphire glass been improved with Power Sapphire (closer to Gorilla Glass)?

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