Recess apple on back:
Over Logo Visualization: so that I can hold in vertical applications the iPhone better or stabilize.
Mute function-notch:
The treasures not easily changeable fixing mute / volume. Thus accidental switchovers are excluded. Have rather short fingernails and come easily to the switch.
Tilting:
Was the main reason is because I set it frequently. Does not quite as stable, but had no problems so far. Makes sure all push and it snaps into place.
Feel:
Is wertig but smooth. Could easily slip off as my previous rubberized version. If you would like the set-up function, there is no alternative.
Total after 2 weeks of use: very satisfied.