AutoCAD - MEP has a lot of great built-in features that is useful for MEP design and calculations. This software helps you draft, design, and document building systems, also create more accurate designs within a familiar AutoCAD-based environment. This program Increases productivity with automated drafting tasks, manufacturers’ parts, and interference detection.
If you are using AutoCAD as a 2D drafting tool, you may find a lot more integrated predefined families in AutoCAD - MEP that is useful for MEP design.