Since the S4 is to have mini now at the same price as the S3 mini last summer, and as the reviews were very positive (I had speed, camera, voice quality important), I've decided. In the selection nor was the Sony Xperia Z1 Compact (although I frankly too expensive) and the Sony Xperia SP (larger and considerably heavier, camera weak, call quality and wireless reception is poor).
The move was definitely worth it! It is felt even smaller as the S3 mini, plus easier. The performance is worlds better, the battery life longer, the camera features extensive, the reception (GSM and WLAN) very well. It's really very easy to handle and can easily be operated with one hand. However, it is very smooth with no envelope, you really have to be careful that it does not slide out a hand.
Price / performance voices in this really smart! More needs MMN no man.