I've literally written the book on the Stylus 1s (Steve Frankel - "The Compleat Stylus 1s and Stylus 1" - Amazon) and I've taken mine all over the world and it's never disappointed As long as you don't use it it in darkness for very dim available-light, you can get fantastic photos with it, even if you use digital cropping and shoot at 600mm. Just see the color plates that illustrate the book -- you can see them for free using the Preview function on Amazon. A constant 2.8 aperture and the same EVF that is used on the Olympus OM-D M10 are features you don't have any right to expect in a $550 camera!
Dave Hurwitz: I have the camera and am generally quite pleased. I shoot raw+jpeg and have used the jpeg images only to transfer to my iPhone for emailing or posting on Facebook. The lens is a little softer than I like but I'm also carrying a Nikon D750 on trips, so the comparison is not fair. Color is decent and I have found it easy to adjust raw images to my preference. I have found some tendency to overexpose and wonder if this is typical of the camera. I often shoot at -0.7 EV to avoid this problem. I don't have to underexpose nearly as often with my Nikon DSLR. Realizing that there will always be compromises with this type of camera, I am reasonably happy with it.
I bought the ZS100 about 3 weeks ago when my Sony RX100-III was stolen in St. Petersburg. However it took only about 50 shots to see that the lens was much softer than the RX100-III, both in the center and on the edges at all focal lengths. I took it back and exchanged it for the Leica D-Lux Type 109. What a difference! Luckily, I still have (and love) my Olympus Stylus 1S which is slightly larger than the ZX100, but still much sharper (despite the smaller sensor) and with a better viewfinder. It's a shame you didn't include it in this group of cameras. It's still available (about $700) and its a terrific buy!
pete guaron: When I finally made up my mind, I preferred the build quality of the Canon PowerShot to the Sony RX100. Other people might prefer later models of the PowerShot, but I chose the G 1X mark II - not exactly a "pocket cam", but it has all the features I was looking for. At the end, the RX100 IV was "interesting", but the build quality didn't appeal. The Leica D-Lux was also a contender, but lacked both a tilt screen and touch screen.
I've had the Leica D-Lux for about two weeks and not only has it been outperforming my Sony RX100-III, but from the natural color palette and three-dimensionality of the images, it has been every bit the equal of my Fujifilm X-T1, and Olympus OMD-Mark V sensors -- both with a wide variety of the top lenses. I know it's supposed to be an expensive clone of the Lumix LX-100, but I suspect that probably due to the assembly process and/or cherrypicking-components, the Type 109 Leica is a lot more. At this point I'd say it represents the best trade-off of camera size vs. image quality I've ever shot with since my film Nikon FTN, Rolleicord and YachicaMat.
In the case of interchangeable lens cameras, where does it explicitly say what lens was used to shoot the studio image shot? For instances, we the Olympus OM-D shot with the 12-50mm zoom, the older 14-42mm zoom, or some other legacy lens that few people use anymore. If you're not doing it already, I'd suggest shooting with the most popular package lens and then listing the identity of that lens prominently on the same page as the comparison engine.
I would have liked it better if had used the original Minox form factor that was about the same size and shape as a BIC lighter (with square corners) or a 5-pack of chewing gum. Naturally the body would telescope out to include an EVF viewfinder. An LCD screen wouldn't be needed. Given a sharp lens and sensor, I would grab this Minox and pay around $500 for it!
I'd add the Panasonic Lumix FZ200 to the list. I've gotten superb results from it that rivals my OM-D and RX100 in quality when results are blown up to 13x19" or shown on a 28" Apple Monitor; and it proved more versatile than the OM-D which I have equipped with 2 zooms and the 14mm, 25mm and 75mm Lumix lenses. Couple it with the RX100 for a 2 camera, 2 pound (total) combo. Despite theoretical problems with the small sensor, it functions extremely well in practice and the 2.8 aperture from 25mm-600mm is unexcelled by any 2012 camera regardless of price. Add weather-proofing and it would be virtually perfect.My votes would go for the FZ200, the RX100 and the OM-D in their respective classes.