What I noticed:
These are bigger than the other 2 types I’ve got and instead of rotating a dial to zoom you simply move the front of the light forward or backward. It is easy enough to be convenient but not overly so in which it would slide back without you wanting it to. The action feel deliberate and nice and not rough, rugged or resistive. I really prefer this option to the turn style as you can focus or widen the beam much faster. If you are going to use this in a tactical situation I would say that is paramount.
Here are my pros and cons:
Nice zoom action, smooth
Quick zoom action
Ability to use lithium ion 18650 or 3 AAA batteries
Crown at the front that would be formidable if needed
No belt clip (but a holster can be purchased separately inexpensively
Overall, I’m thrilled at the quality of the lights and am glad I’ve got one to give to my wife for some extra protection. I give this 2 thumbs up!