I have both. Suffice it to say I have not carried the KL1/E1e since I received LSH-P 021 /ubbthreads/images/graemlins/grin.gif My only misgivings were the LSH-P's clickie tail switch, which looked like it could turn on intermittantly in my pocket and the lens.
The switch has not been a problem, to date. I even bought a twisty tailcap, but the LSH-P is a good size for my hand. The KL1/E1e is and even better fit for my hand but not my pocket.
I am still looking for a better way to protect the LSH-P's lens. The factory lens protector started peeling off immediately. I might try the SureFire beam shaper some people have adapted to the ARC LS. Anyone know why ARC did not use a glass lens?
At first I did not notice much of a difference in brightness between the LSH-P and KL1/E1e. The difference really shows in the throw. The LSH-P lights up the far end of my basement much better. I did notice a significant difference in color. My KL1/E1e is noticeably blue. My LSH-P is white with just the slightest hint of green . . .