How to get the difference between the values between two matrix table in another matrix table

I am doing report on matrix table, in that I am using two matrix table consisting different headers but having same input as value.

due to this reason the value are getting different so I just want to know how can calculate the difference between the two matrix table values in seperated matrix table.

This is 1st matrix & similar way we have another matrix so how can get the difference between two matrix table in seperated matrix.

Matrix 1:-

Matrix :-2