Another excellent review, as always.
This light was an anomaly for me: one that appealed to me so much, I bought it *before* your review. Trust me, that almost never happens!
Just got it earlier this week, and so far I'm absolutely loving it. NiteCore hit this one outta the park. It ticks all of my boxes: forward-click/momentary-on, variable output, easy selection of modes while off... Many of the things I love about my ThruNite Scorpion, but done better, and with a more traditional forward clicky.
I think the "feel" of the control ring is the best yet: it's not as "viscous" as the Sunwayman lights, it turns smoother, but with more positive detents. What with the long gap in the variable-output section, it's pretty easy to find the Standby mode by feel, and I've found it easy to remember the rest from there. As for markings, you use a flashlight because it's dark; what good are printed markings in the dark?
I'm surprised you find the "soft start" on low-to-middle modes unique, since you compare it to the SWM V20C; My V20C exhibits the exact same behavior, it's one of my favorite features. I don't think it has anything to do with reducing stress on the battery, I think it's to reduce stress on the eyes. For "tactical" use, where you want maximum output *now*, there's no soft-start on max output on either light, which makes perfect sense.
But the SRT7 as a "V20C-killer"? While there may be some overlap in usage, I see these two lights as quite different. The other remarkable thing I admire about the V20C is that it's the same diameter and overall length as the compact P26-class 2xCR123A lights, like the Surefire C2 or Dereelight CL1H, despite the extra complexity of a control ring. The NiteCore SRT7 is a much bigger light, significantly longer and with a big honkin' 40mm bezel. Again, though, for what it offers, it's pretty compact; for instance, it's shorter than my Thrunite Scorpion, even moreso the Scorpion with the turbo head.
And, "G25C2-II killer"? I dunno, Eagletac isn't shy about driving emitters hard, like they were rented mules. The SRT gets beat on raw output, but yeah, the more added utility of the RGBs plus the more elegant UI put it ahead in my book.
Speaking of the RGBs... I don't know how much use I'll make of those, but hey, they're there if I need 'em, no harm no foul if I don't. I agree though, using that "police strobe" in public might not be a great idea unless you've got a badge on your chest.