And so that you can convince yourself of the clearly visible edge blur when shooting with a 24 mm focal length, and the otherwise impeccable picture quality of S200, I've also added a link to images in full resolution in the first comment. You will also find a video.
But ...
______________
In principle, the S200 is a stripped S100, when some were omitted functionality. So you can turn no ND filter in S200, and the RING FUNC was omitted. You can also save any settings in order to then access later convenient reference. In addition, it has the ability - take pictures in RAW format, and videos in 1080p - taken. She also has only one CCD and not CMOS Sensor.
Unlike the S120 it also lacks a touch screen, it has only the Digic 5 and not the Digic processor 6, and their objective is not quite as bright as that of S120.
Due to the currently small surcharge for S120 I can only advise you to S120 so. At this point, I will refrain from doing even this strange policy by Canon. Alone the RING_FUNC button [For example the Exposure Time (AEL) or the Focus (AFL) for the next shot] would charge me the value already.
If you would like more information regarding the benefits of these additional features and capabilities, I will answer your questions in the comments. At this point it would be beyond the scope of a review.
______________
What else is important to me:
+ The case has become much more handy and ergonomic compared to the S100. The flash comes now only out manually via button. In general, the camera is again better processed as the S100. The adjustment wheels lock into place clean. And the keys have a defined pressure point.
+ In the semi-automatic functions, I can reprogram the front ring eg ISO or brightness, which I, for example, in the auto iris next to the exposure time can also adjust the set there function manually.
+ The picture quality has not suffered despite really visible CCD sensor. The images rushing 'felt' a little bit more. But all at a high level for a Kamrea this type.
- The maximum aperture is still. 8
- Attaching the wrist strap designed almost to a small Matyrium.
______________
Conclusion: Access to the S120, and be happy.
Should you have any questions about specific points of my review, so I answer that, as far as I possible, like in the comments.