AFAIK at this point the only two smaller 18650 lights available on the market are: ZL's own SC64 line and DQG's Tiny, but besides the ~8mm decrease in length, a ZL destroys it in every other category except price.
Oh, I forgot I even had a DQG Tiny. Yes, it's a nice light, and extremely small. Not much bigger than just the battery. But, yes, the Zebralight is a nicer light overall. I guess that's why my DQG gets so little use. If you have a Zebralight, the DQG doesn't really have a place, unless you really really need something a bit smaller.
Just received my sc600w Mk IV HI today. The shipping within the US was extremely fast. It only took four days to deliver.
Jealous! I'm still waiting for mine to ship.
It's in stock, but I guess they all took the last few days before Christmas off. Still, mine has to come from China. Does China even take Christmas off?
Anyway, I was trying to decide which SC600w mkIV model to get, but from reports like yours, is sounds like I made the right choice. It will be my first Zebralight with the new UI, so I'm looking forward to setting it up so I don't accidentally blind myself in the middle of the night with a bad click length. That was really my only complaint about Zebralights, in the past.
Not sure why some people complain the lows aren't low enough on the Mk IV's, it's super low. Too low for me to ever program the lowest in fact. I like the "moonlights" too.
The really low moonlights are great for getting up on moonless nights, if you live out in the country. Just enough to see with, but not enough to wake you up or spoil any night vision. If you have any stray light at all (neighbor's street lights, you live near a town, etc), then the lowest moonlights are rather pointless.