I think if you've seen it, you'll already know the theoretical differences.
at a practical level then we are in the beginning so I think it's all evolving and constantly improving, a little marketing in who sells this type of functionality will be there . with the time will probably be more required.
as you will know the main differences at the theoretical level I would say that they are: a cad model is like a photograph of an object, while a digital twin is like a dynamic evolution that shows the object and how it changes over time.
the digital twin completes the geometric representation of the cad, providing a more global understanding of behavior and physical object in the real world.
will, for example, test virtually in advance the operation of technical systems and digitally tune the details of control systems
There are different types of digital twins.
digital twin prototype (dtp),digital twin instance (dti):digital twin enviroment (dte)
since the digital twin concept embraces the entire life cycle of products that consist of creation.
to many digital twins is associated the cad, but visual representation is not a fundamental. the digital model, could be either a spreadsheet or a database.
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static and geometric representation especially during design
digital twin- dynamic representation is a virtual model that replicates an object or physical system in the real world, simulating behavior- during entire life cycle not only in design, but also during production, operation and maintenance . - complete data: integrates data from sensors, control systems
- real-time update through iot
