I read that the geoid is very close to the real earth shape(less than a meter off the MSL) and that it is at most 100m away from the WGS84 spheroid, then I saw such models where the MSL seems to be thousands of kilometers away from any spheroid, are those hugely exaggerated and inaccurate models or am I misunderstanding something? (from my understanding 100m shouldn't be noticeable and a good earth model should be a spheroid - almost a sphere - 22km difference between the spheroid axis shouldn't be noticeable as well).
Thanks for the help.
The geoid model:
See original post for the graphic