I did a quick comparison with my current AAA edc, the Lumintop Tool 219b.
Preon is not quite as bright on high and a little more greenish, medium is about the same, and Preon has lower low which I like.
Preon has forward clicky and better UI than the Tool's goofy M-L-H, but my preference would still be for L-M-H+burst with no memory.
Due to EN plating, Preon has no lockout.
Preon has much better pocket clip, but lacks dedicated lanyard attachment.
Overall I think the Preon is a better light, but it had better be at over twice the price of the Tool. I'm still not sure if it's worth the price difference.
Interesting. I hadn't loosened it quite enough when I first tested. The comparison was done with Preon burst vs Tool high. The difference is very small. I could only notice with them side by side.Actually the Preon does lock out if you loosen the head. Regarding brightness, are you comparing the Preon on high mode or burst?