How to compare results of two or more simulink models in one?

I want to compare results of 2 simulink models in a separate model to compute parameters like error rate, psnr, relative error rate, etc. How could I do this? Is there any way to import an existing simulink model as design?

[Manikanta Aditya]

Diff and merge changes between Simulink models - MATLAB (mathworks.com)

[Manikanta Aditya]

Model Comparison - MATLAB & Simulink (mathworks.com)

Select Models to Compare - MATLAB & Simulink (mathworks.com)