AJO data schema compared to Marketo Engage data schema

Hello,

Ive been working with a client to create a data plan around migrating their current marketing platform to Marketo, including creating a schema for standard fields, custom fields, custom objects, and custom activities. There is now an opportunity to use AJO instead of Marketo and I was wondering if and how the data sets between AJO and Marketo differ. My understanding is AJO uses data sets with data fields organized within them that are able to be toggled on/off during selection. Is there documentation that contains a comprehensive list of the data sets and fields in AJO?

Thanks!