The images show internal and external components like SIM trays, the Apple logo, Home buttons, the internal speaker and vibrator motor all appear to be differently designed and engineered than the comparable parts found in the iPhone 5s.
The leaked parts suggest that the next iPhone will be offered in the same silver, gray and gold colorways as the iPhone 5s while featuring an improved vibrator, the embedded logo on the back and possibly an enhanced sound system.
NowhereElse post notes [Google Translate], these parts which have been obtained from an unnamed source offer a good indication about certain design elements of the handset. Starting with the embedded logo on the back, something Apple hasn’t done since the original iPhone (iPads have had them from the onset, though).