positive differences to its predecessor:
Display: clearly visible difference, especially when both devices are adjacent. Higher resolution clearer colors
Battery: despite the low growth, the battery is keeping two full days (predecessor held almost nen day) over medium usage (10 times / day every 3 email accounts queries 5 WhatsApp, repeated use of "face book"), UMTS rather than 2G.
Camera: runs faster than its predecessor, nice features. Front camera is sufficient for Skype.
Speed / CPU: pure jerking, no waiting as its predecessor, Apps no longer lubricate from. Device is not warm.
-OS / Android: new, useful features have been added. Power Saving Function sparrt battery, but the device does not slow appreciably. Is permanently with me.
Sensor for GPS / GLONASS provides ne accuracy up to 5m.
Memory: if one does not exaggerate and installed everything possible, the memory is enough. The old model had much less what has made very quickly noticeable.
negative differences:
the only thing that is negative attention the seemingly sensitive housing. But this will prove if it has slipped a few meters over the asphalt or pitched hard.
Conclusion: the device is the 100 surcharge worth.
The unit I would buy again and also recommend.