They are completely different beasts. Internet Explorer merely offers the option to enable[1] "Do Not Track", which websites and advertisers are free to ignore[2], while Safari's new ad tracker blocker "uses machine learning to identify trackers, segregate the cross-site scripting data, put it away so now your privacy — your browsing history — is your own"[3].
[1] https://en.wikipedia.org/wiki/Do_Not_Track#Internet_Explorer...
[2] https://en.wikipedia.org/wiki/Do_Not_Track#Effectiveness
[3] https://techcrunch.com/2017/06/05/apple-adds-a-tracker-block...