It's reasonably clear why the Microsoft case was different
> The U.S. government accused Microsoft of illegally monopolizing the web browser market for Windows, primarily through the legal and technical restrictions it put on the abilities of PC manufacturers (OEMs) and users to uninstall Internet Explorer and use other programs such as Netscape and Java.
Microsoft made deals with other companies to restrict competition. Apple doesn't need to make up a contract to prevent NFC payments as they just don't offer it in the first place. The Microsoft case actually has a lot more similarities to why Google lost the Epic case, by Apple won.
It's reasonably clear why the Microsoft case was different
> The U.S. government accused Microsoft of illegally monopolizing the web browser market for Windows, primarily through the legal and technical restrictions it put on the abilities of PC manufacturers (OEMs) and users to uninstall Internet Explorer and use other programs such as Netscape and Java.
Microsoft made deals with other companies to restrict competition. Apple doesn't need to make up a contract to prevent NFC payments as they just don't offer it in the first place. The Microsoft case actually has a lot more similarities to why Google lost the Epic case, by Apple won.