Color me amused! Guess who else claims the EXACT same thing:
Phantom Skinz. I would put money down that these two companies use the same exact material. It seems that both get the best reviews and the happiest customers out of all the brands.
Now that I think about it, I believe they're actually the same price too! Now I don't know about Ghost Armor, but Phantom Skinz gives you two protectors for your $ (so a screen only 'kit' would be about $9 and change, and comes with two kits).
I also suggest googling coupons for Phantom Skinz if you go that direction (I found a 30% off coupon code two days ago that works). I'm in NY and they had free shipping and no taxes, so I ended up getting mine for $6 and change.
Again, these two brands are most likely the exact same material, and if they're not, it's probably comparable. I would go with whatever you can find for the least $: it sounds like neither will disappoint.