I have two XNovas (1xAA) and one of the XNova clones (1xAA). Based on my samples, the XNovas are much brighter than the clone clones. The clone clones aren't really bad, and most non-flashaholics would likely be happy with them. But on mine, the output was much greener than my greenest XNova and was probably less than half as bright.
On the other hand, one of my XNovas is really flickery until the light is all the way turned on and (ie probably flashes off and on 20 times from the time you put the tailcap on until it is screwed all the way down) and the spring gets turned sideways by the time you put the tailcap on, screw it down and take it back off. The clone clone has no such problems.
Just my experiences. /ubbthreads/images/graemlins/smile.gif