Here are the comparison photos
Top photo - New Cree Q5 on the left and Luxeon 5w on the right. (both are Cygolite Dual 300 light heads)
As you can see Crees have a wider throw of light due to the increased intensity being magnified by the standard Dual Cross lenses.
Outside this translates into a wider and brighter beam.
So I'm very happy with the 20.00 investment.
Bottom photo- Luxeon 5w on left and Cree Q5 on right.
After 15mins new Crees are running slightly cooler than the Luxeons.