Blocks vs. Families
AutoCAD
- AutoCAD use DWG files for storing individual block.
- Block can have different kinds of attribute for storing the property.
- Complicated setup
Revit
- Contain many styles of components
- Create intelligent parametric objects
- Support nested families
- Formula parameter
- Easy to create different styles families

Revit can provide the easy organization and data sharing, and offer numerous placement options. Also it would be dynamic change the shape of object when the situation was changed. Most important that it would be alert you when the object was wrong modify.

No Command Line or Layers
AutoCAD
AutoCAD users will notice the absense of a command line and the layer control feature.
Revit
In the Revit, building tools and componenets are presented on a Design bar.

AutoCAD users normally would like to use commands for their daily sketching. But nowaday application software was enhanced a lot of the GUI, so that we can forget the command input and use the artificial intelligence GUI. And we have time to do another stuff.

Layer
AutoCAD
Use layer manager for managing a layer, linetype, color and the layer properties
Revit
VG short cut to display the Visibility/ Graphic Overrides feature, which work on a per-view basic.
Color and linetype are also controlled by defined category.

Reference file
AutoCAD
Xref command
Revit
VG

Permitive solid
AutoCAD

Revit