AlphalphaPB,
I was comparing to my X5 (old-style), but I got to compare it with my best friend's X5T earlier tonight. The KL1 is noticeably brighter, and has better throw outdoors. [Sorry, no beamshots. If I'm able to get some with my nonexistent photographic skills later this week, I'll email them to you.]
I also got to use the KL1 for 30+ minutes at work this evening. I like it alot better than the X5. Not only brighter, but I like the quality of the light better. I know there are variations with these Luxeon Star LEDs, but the "violet" beam color alot of people are describing (and that I wasn't happy to hear about originally) is because it's on the blue and red side. This actually works out great in actual use, and is the reason that so much detail is visible with it, especially outdoors. My X5 looks yellow-green next to it. Instead of "fading out" natural colors, my KL1 makes them stand out more, because of the beam's contrast.
I love the X5, and had really set myself up to be disappointed with the KL1 after some of the stuff I'd read about the varying beam quality and brightness. Was initially underwhelmed by the brightness, but it turns out I'm real happy with the KL1, and glad I bought it. There are some things the X5 is still going to be better for, IMO, especially any time the light is used *very* up close. The KL1 is actually too bright for some stuff-like digging around in my locker, and later my truck looking for something tonight. Too much glare.
Kind of thought it was a waste of money getting this thing, since the E2e+X5 seemed like a great combination. It was really to have a new toy, but after just one day of use, I'm already convinced that this was the way to go for the things I need a light for most of the time, and it's the only one that I'll be carrying from now on, unless I'm sure that more throw and brightness will be needed. It's going to be my main light for work, EDC, and even camping.
Guess that was a long way to say "yes it's brighter", but I wanted to give the reasons I liked it better, and the positives, since I already made some comments on what I thought were the negatives.
I hope everybody else that gets these is as happy as I am with mine. It bothers me that there is so much variation in performance from one to the other in a production item (from what I've been reading on candlepowerforums). I think we should be able to know what to expect when we put our money down. Guess that's the price we pay if we want to try out this new technology stuff.
Lots of other people have commented on the KL1 on the LED forum at
www.candlepowerforums.com in case you haven't looked around there.