profileHierarchy vs serviceClassification

I have been trying to understand what is the main difference between
having a profileHierarchy and a serviceClassification/serviceProduct.
Is there any or are they the same thing? Is there any example I can
study, I did not find anything that enlightened me.

Thanks for your help.
Pedro Pais
Skype name: pedro.pais
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Received on Friday, 25 February 2005 16:28:37 UTC