What is the difference between my Profile and my SSD?

Your profile contains information about e.g. your personal system preferences, your personal preferred conventions, your chosen profile image.

See our Knowledge Base help page : --> How do I change/update/edit my profile?

Your SSD is per definition by partnership agreement and can therefore be totally different than your own personal profile.

See our Knowledge Base help page : --> SimpleSystemDisclosure 
See our Knowledge Base help page : --> Set-up/Edit/Update an SSD