Data fields do not have to be consistent across attendee types. The flexibility to capture attendee information at the ticket level gives ticket admin the ability to capture data based on their needs.
We recommend clients create a data baseline (i.e. company, title, etc.) but have the flexibility to require additional information when it make sense. For example, for a standard event a client attendee type captures name, company, title and purpose of entertainment. For a premium/executive engagement event in addition to the basic information in the client attendee type, employees may also required to provide additional data like a company profile, relationship summary, etc.
Data fields are set to an attendee type through a field relevancy profile. See the attached deck for more information. If you cannot access the deck, contact Concierge Live Support at support@conciergelive.com and support will send you the deck.