MPN difference and possible compatibility problems
Maybe it is a silly question, but however... I want to replace my optical drive for a mid-2007 Macbook 13", model UJ-857-C. I have found exctly the same model, but the MPN is different: 678-0557B against a 678-0557A. I would like to know if it could pose a problem of compatibility or if it depends only on the country the drive is manifactured in (one in China, the other in Indonesia).