AS9100 Rev D differences from ISO 9001:2015

Answer: As per the title of the document, AS9100 Rev D is applicable to aviation, space and defence organizations (commonly called the aerospace industry). This document includes all of ISO 9001:2015, with some additional requirements that are necessary for the aerospace industry. Along with some minor inclusions throughout the standard, some of the main additional are operational risk management, product safety, configuration management, product safety and prevention of counterfeit parts.
For a better understanding of the AS9100 Rev D requirements, see this whitepaper: Clause-by-clause explanation of AS9100 Rev D, https://info.advisera.com/9100academy/free-download/clause-by-clause-explanation-of-as9100-rev-d