Model is a tool to simplify the real world, so that you can understand complex reality. You create a model. Since you create a model, your model is different from others. Your model is unique to your self. A model is a reflection of your world view or yourself.
Perception of reality is different among individuals.
This obviously poses a question. There is no absolutely true model. Correctness of a model is measured by comparing the model against the real world. Some models fits better than other models, which makes some of the model more correct than the others. However, this does not mean the model is absolutely correct.