Are there any differences between iPhone 7/7plus sold in different countries? is there any quality difference between an iPhone bought in Dubai and an iPhone bought in USA? to be  precise, my question is about the quality of the gadget itself (hardware), because some of my friends claim that if you buy an iphone 7/7plus in USA, the quality of the gadget (resolution, camera, durability of the gadget) is way better than the one you buy in Dubai or any other country rather than USA. I HOPE this time i am more specific.
i am looking for your answers. 

respect
No such quality difference has been disclosed by Apple, nor do I know of anyone outside Apple discussing such a quality difference.