Default Different nexus 5 hardware

Hi, due to several defects, many have chosen to send back the nexus 5 to receive a new one. infa89, a member of an Italian forum, had the following defects:
dancers and noisy buttons
SIM tray protruding
"cutting edge" display frame.

Comparing the old with the new phone, he noticed several differences, as you can see in the picture.

The new one has none of the above defects, it has
fixed buttons
larger microphone and speaker holes

more yellow display
green stuck pixels.

Someone else has noticed differences between his nexus and replaced one?
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