"CornKid", my KL1 is 4th generation and is "much" brighter!!
"Scuba", the KL1 has what Surefire refers to as "a light focusing lens", "close-up" @ 12" or so, the outer rings are ringed and "purplish white" (2rings) the inner is "rectangular" and yellow, the very inner is a more white (but still somewhat yellow) smaller rectangle. there is a "purplish white" square around the outer, yellow square. (if all that makes any sense!).
I have decided for myself, that I really prefer a reflectored light, vs lens or optics; just my preference.
Had a Inova X03, which I sold, have an Inova X0, which I may sell (both have the "Tiros" lensing), similar to the KL1.(round vs rectangular)
Very interestingly, at a distance, 18' or so, the "throw" and beam pattern of the KL1, appears much more round and looks whiter (than at "close" range), the QIII, is at 18' still "whiter".
The E1e, Kl1 combo seems much more solid, looks (in my opinion), much better and certainly has more power; Surefire is, though about 2x the price! I carry QIII, when I think there is a chance to "lose" it, as has oft been stated on this forum, QIII is verg good for the price, personally, have decided against modding it. (cheap looking body, dont like switch ,just IN MY OPINION!!) I really like my TnC "AA" and my LionHearts, but they are a different classes of light!
"just my 1/2 penny's worth"
jeffb