What each term means in practice
A simple CRM
A simple CRM is an opinionated product. It ships with a fixed set of objects, sensible defaults and a small number of decisions to make. A sales manager can configure it without a consultant, and a new rep can be productive in an afternoon. Its power comes from convention: it assumes you sell in a fairly normal way and optimises for that.
An enterprise CRM
An enterprise CRM is a platform. The data model is extensible, permissions are granular to the field and the record, and changes are built, tested and released like software. It assumes multiple business units and audit obligations. Its power comes from configurability, and that has to be administered by someone.
