Different outputs coming for the same circuit?

I am solving a circuit using BJT device, for BJT I am trying to use BJT ebers moll equivalent model, in ebers moll model current sources is replaced by Nonlinear VCCS (in ADS).

After that i write nodal equation of the Circuit in which BJT ebers moll model equation is used to get output, and write MATLAB code for that equation.

I expect output will be same but both (ADS and MATLAB) outputs are coming different. I don't know why.

CAN YOU PLEASE GIVE ME YOUR OPINION# WHY IT IS DIFFERENT, and WHAT CAN BE DONE TO BRING THE OUTPUT SAME.

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