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Power Crystal because it's easier to apply, clearer, and I think a little thicker.
 
SGP crystal, I've had good success with SGP screen protectors, and they're easier to get shipped quicker due to them being sold on eBay and Amazon. They're also great quality and can't even tell that there's a screen protector on.
 
PS crystal.
I've had both, and the PS has been more resistant to scratches and generally lasts longer. They're both good choices though.
 
Do any of them have a cut for the extra sensor on the white? The pictures just show one cut for the speaker, and the white ones have one extra cut above the speaker.
 
Power Support does. Just installed it on my 4S.
The picture on their website does not indicate an extra hole:
filmiphone4_5.jpg


Have they updated it since it first came out?
 
Wirelessly posted (Mozilla/5.0 (iPhone; CPU iPhone OS 5_0 like Mac OS X) AppleWebKit/534.46 (KHTML, like Gecko) Version/5.1 Mobile/9A334 Safari/7534.48.3)

PS. Using the clear ones now on my 4S, and have used PS since my first gen iPod touch and on every iPod inberween...really can't beat them.
 
Has anyone used the moshi white one?

been using it for a few months now, applying it was easy, overall recommended screen protector, but the only drawback is that its anti fingerprint, so it kinda blurs out the retina display.
 
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