This is surprisingly common with Metallica for some reason. Could just be that they have so many tracks that statistically there's bound to be some overlaps.

Another example is "Welcome Home (Sanitarium)": https://www.youtube.com/watch?v=ZiIc0HuJ78Q

Whose intro sounds the same as "Rainbow Warrior" by Bleak House, released 5-6 years earlier: https://www.youtube.com/watch?v=zowid7KAmnM