I will not digress, because here many detailed reviews were verwasst.
I would like to comment on whether the transition from the S110 to S120 is worth much more.
From the S110 I was very begesitert. A compact camera with a lot of settings, which can also act by laymen as by professionals the images.
Files
Nevertheless, I am to shoot short video clips also a big fan of it, and because me the S120 has gereitzt that receives at 1080p at 60fps. The S110 makes good video recordings but only with 25-30fps. And if you two videos compared look, recognize the difference. I like to edit the videos on the computer and bie 60fps can also create beautiful slow-motion sequences. Therefore, it was for the main reason.
Now one would think, of course: "If you want to make videos, but you put on a video camera."
In fact, I've toyed with the idea. But in addition to the budget, you have to think also prakmatisch. It's all about taking pictures in the first place. But one might also make beautiful videos. And I do not want to carry around two devices necessarily there.
And all who say now: "Can you really do anything with the phone." The best cell phone camera does not so nice shots as a Middle Class digicam. Point!
The Lightning:
I was thrilled (which I previously knew not at all) from the manual use of the flash. When S110 drives the flash of its own accord from the case when it was used in the auto mode. This one was too often surprised because the finger then :-P had it Now it's manually. On the screen appears the only recommendation: Switch flashlight.
I am particularly pleased that you, unlike the S110 in S120 also in Auto mode to force the flash! When shooting with sunlight in the background is extremely important. That has always bothered me in the S110.
The disadvantage is, unfortunately, that the lightning comes out shot with a spring, which is in stark contrast to the noble body of the camera. Retracted also engages the flash and has built quite cheap anyway. When S110 he drove beautifully purely mechanically and out. I would have liked also in the S120 so. This is only Prestige.
Housing
To stay with the Prestige ... The housing acts as noble as its predecessor. Unfortunately, acts like I said, the flash bit cheap. Also, the switch for the zoom has a shortcoming. He is a bit loosely fitted, and has some breathing room before he finally starts to zoom. It may of course be that it is only in my model the case.
Also it is a little (a few mm) thicker than the S110. This should be kept in mind when you bought tailor-made covers for the S110.
Battery:
For the S110, a replacement battery had bought, and then unfortunately had to find that the S120 has a thinner battery. When battery life I could tell from the feeling no difference. I have the time, however, not stopped meticulously.
Speed:
The more powerful CPU you can clearly see. The operation through the menu and especially the autofocus are significantly more agile than its predecessor.
Screen:
The screen is bigger and provides a clearer picture. Although nice, but in the end of the camera at the end of the screen is so only shoot for photo and check whether the images have become what. Presentations can not be done with this screen also. Better to connect to the phone or the phone and look at the pictures so. The screen is so definitely not a reason to buy.
Conclusion:
In summary, speak a faster refresh rate in Full-HD video, full control of the flash in auto mode and faster focusing for the S120. With the caveats on the housing can live.
However, you should still consider whether the 100 wants to invest it. (I expect an average resale value of the S110 on ebay in new condition.)