What advantages do computer models have over physical models? what is an advantage that physical models have over computer models?

Overall mean MRI assessment scores were significantly higher in students utilizing the physical model (86.39%) compared with students using textbooks (62.61%) and the 3D computer model (63.68%) (P < 0.001), with no significant difference between the textbook and 3D computer model groups (P = 0.685). 
physical models advantages
You can understand better your product. 
You can improve it. 
You can have a proof of concept. 
computer models 
The technologically advanced torch shown below has been modelled so that the internal electronic parts can be seen. Making an actual model to display this type of information would be virtually impossible. However, a computer generated model can be animated to show how the parts fit together. the outer casing can be made to look either transparent or translucent. This would be difficult to achieve and be time consuming if a real model was to be manufacture

You can see inside of cumputer models with one click but physical models are also actually there so you can pick it up and get the gist of it better