I've collected some related data here:
Lumintop Worm SS / Brinyte BR-S2 / UltraFire SA-R2
The weight measurements are not mine; i will provide a "detailed" review of my own at some later point. I am informed that Lumintop has recently updated the LED emitter of the worm to XP-E R3 and perfectly white tint (1A0 tint bin). Anyone interested in purchasing the Worm (Aluminum version!) these days should contact the manufacturer (1 quick email!), confirm the given data/info, and ask which place carries the latest Worm hardware revisions. I have both the SS and the Aluminum versions and am extremely pleased with them. The length difference to the iTP A3 is not of concern or interest; most 1x AAA twisties are in the 71-72mm range -- the iTP A3 is a grand exception to this rule. The Worm still feels small, and the Aluminum version is as light as my Titanium A3. The Worm is very high quality machining and built, with FREE lifetime hassle-free guarantee. If it dies or you wreck it, you get a free replacement from the manufacturer!!
I have the Klarus MiX6 on order and also the Tank E09. Once i got them all i will able to do a comparative quick review. The E09 and A3 both officially support 10440's/Protected 10440's -- that's my primary interest in them.
How to run Protected 10440's in the A3? I've mentioned it here: