I have owned both and will weigh it.
I'll start with cloud defensive.
CD lights are absolute trash.
1) On high they cannot dissipate the heat they produce making the light too hot to hold VERY quickly…
2) the light cannot sustain its output on high for long at all. I'm talking a 40-50% drop in output within the first 45-90 seconds from turn on. It's super noticeable to the human eye.
3) the tail cap had several issues, including needing to watch a tutorial crested by the company to show you how to take off the tail cap without breaking the washer. (What a joke)
4) they honestly just feel like a cheaper made light.
I can continue, but I won't… I don't own a CD anymore and don't envision myself ever doing so in the future.
Now for modlite :
I have been using and carrying a modlite for work for the past 4+ years now, since the gen1 heads.
They are absolute workhorses.
I still have the gen1 PlhV2 head that I carried for work daily for years and it still works as well as the first day I received it. Since then I have also bought the newer PlhV2 head with high/ low mode and it's absolutely fantastic. The fact they allow you to change between a high/low mode and just high mode is clutch. 1 head to do it all…
I have also picked up a HOG and it's a beast. Though I would say one of my favorite setup's is the HOG body with the adapter with a normal PlhV2 multi mode head On it.
Runs on the 21700 battery so you have plenty of sustained output, and on low you could run it forever.
Anyway, I hope you take the plunge and grab a modlite, once you do you'll never go back.
Since then, I've pretty much carried modlite exclusively for work. Malkoff and all my other lights including surefire couldn't really compete…
For EDC I rock an HDS - but this summer modlite is releasing a much smaller head for EDC, so I intend on buying that smaller head, throwing it on an 18350 body and seeing if that'll work its way into my edc rotation.. I'm sure it will, though I do love my HDS rotary.
To summarize… modlite is GREAT…. Cloud is trash.
I'd suggest plhV2 for handheld. OKW for a long gun light with glass attached