3D models, whether in augmented or virtual reality applications, are designed to accurately capture the condition and behaviour of a real object (a machine, production line, etc.). Then you can transfer actual data about real objects to an artificially created environment that users find easier to understand.
A digital twin is a dynamic software model created by a computer. Its function and behaviour relies on data from various sensors mounted on a real physical object. A digital twin responds to various conditions of the surrounding environment and, based on obtained data, predicts breakdowns and changes the production plan.