There are main basic differences between client account and client profile.
The client profile is where you're going to save all the information related to your client that will be used when you open a case. All the information here will auto populate the forms and you can always reuse it.
Here you can manage all the information related to your client that will be used on the forms.
The client account is the place where you manage the credentials from your clients to access the NEUTRINET platform.
Here you can manage for example the email that your client will access the platform. You can also deactivate the profile if it's not in use.