Composite or Ceramic back?

[jaymc]

... what the heck is the difference, what does the Ceramic back offer that is better? 😕

 

[Poochi]

... what the heck is the difference, what does the Ceramic back offer that is better? 😕

More scratch resistant at the risk that it will crack and shatter instead if enough force is applied.

 

[Sirious]

See thread at:
https://forums.macrumors.com/threads/1853533/

 

[Julien]

... what the heck is the difference, what does the Ceramic back offer that is better? 😕

The ceramic is a zirconia watch crystal (like the sapphire watch crystal on the front but made of zirconia).