I think the 9w Crees are brighter. Even though the group bulbs have side LEDs.
If you look at the description, you will see that the Cree LED only 5w and not 7w. The side LEDs are 2w bringing the total to 7w.
The Cree LED I suggested for the group buy is a full blown 9w. Big difference in the LED world. And although it doesn't have side firing LEDs, the 9w Cree has a pretty wide angle.
I'm going to order them if I'm not happy with the group buy.