What's the color difference?

my guess is the temperature color.

........

I think someone mentioned before that the Super Whites have a purplish hue to them while the Extreme Whites are more white. I used PIAA EXtreme Whites for my clear corners and they do burn pretty much white.

I've used the extreme whites before and the color output is a pure white color.

Where can i buy extreme white? I checked E-bay, can't find any.

what bulbs are you looking for? I have some extreme white leds for sale.