@Haterade - that comment was in the context of size, in which case, the T40CS and 7G5CS are slightly longer/larger
@FlashPilot - combo of inconvenience, time and ideal location. I live in the burbs with no good access to a nice secluded area where I can conduct outdoor shots w/out light pollution. Thus most of my outdoor comparo shots have been limited to my camping trips which unfortunately have been limited to twice a year. The underpass was THE ULTIMATE location for me but they've since fenced it off. :(
There's a small park not too far from me but doesn't have the length to really show what these lights are capable of, plus as the season changes, the foliage and shrubbery would affect how one perceives the output/beam to make them consistently comparable.
I do have a camping trip coming up again soon... ;)
EDIT: If anyone can suggest an ideal location in Bergen County, NJ for beamshots, I'm all ears!