My digicam isn't quite up to the task of capturing things. I kept getting the white wall of windshield glare.
But perhaps the nattering will help some folks. Went to Pep Boys, and bought one SilverStar bulb in 9007, and off I went. First up, the SilverStar is about 10% brighter than stock. The light is whiter, with a bluish tinge that makes me wonder how the SSes will perform in inclement weather. The beam is longer by a bit, but not any wider, really.
The biggest difference between the SilverStars and the stockers is the color temperature. As speculated, you don't really get that much more light.
The Prodrive lights with the Philips VisionPlus bulbs put the smack down on the SilverStars. The beam was a purer white, bereft of bluish tint. The beam was farther, wider and more focused (projector lenses....duh!).
I'd consider the SilverStars a fine upgrade for the dosh, for those who want to keep their bugeyes, without going to HID.
The comparo took about an hour, and no, I'm not doing it again!