Design
Iphone 12 pro silver and bu iphone 13 pro silver is any different design on back
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If you ask this to use the same cover on the 12pro or 13pro, the answer is no.
Although the overall dimensions of the phone are the same, on model 13 pro the camera module is about a millimeter wider and the position of the side buttons is slightly different.
If you mean something different, please better specify your needs.
Regards
Giulio