Designing Your App to Support Multiple Editions | ISVforce Guide

Supporting multiple editions provides the opportunity to release richer versions of your app that can support more advanced features found in EE, UE, and PXE. There are two technologies that can be leveraged to support multiple editions. The first approach uses extension packages and the second leverages Dynamic Apex. There are benefits to both, so be sure to review both strategies before designing your app.

Supporting Multiple Editions Using an Extension Package
This approach uses a base-managed package that contains core app functionality. The base package only contains features supported in Group and Professional Editions. You then use a second managed package, or extension package, that extends and enhances the base package.
Supporting Multiple Editions using Dynamic Apex
Using dynamic Apex, dynamic SOQL, and dynamic DML, it’s possible to create one managed package for all editions you plan to support without having to use extension packages. Your app behavior can change dynamically based on the features available in your customer's edition. This is useful when designing an app with the intent to support multiple editions.