I was seeking to clarify what the difference between the WGS and the EGM systems was and came across How are EGM96 and WGS84 related to each other?
The question is about the difference between the EGM96 geoid and the WGS84 ellipsoid.
The comment right below the question states that the accepted answer is correct and that the WGS84 standard includes both the ellipsoid and the geoid, and that the geoid of the WGS84 standard is merely updated to the EGM96 geoid.
The most highly upvoted answer (which is not the accepted answer) states that the accepted answer is wrong and that the WGS84 standard only defines an ellipsoid and the EGM96 standard only defines the geoid.
As a n00b to this field, this gis.stackexchange.com page left me scratching my head. There seems to be no resolution finally as to who's correct.