Exporting snp file from HFSS to ADS - shift in the resonant frequency

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    I ran two simulations on HFSS:
    1. With lumped RLCs (boundary condition) to represent resistors
    2. Lumped ports (excitation) to represent resistors. I exported the snp file from the second simulation to ADS and replaced the ports with resistors with the same value as that used for the lumped RLCs in the first simulation.

    There is an increase in the resonant frequency in the second case compared to the first case. I tried multiple cases such as de-embedding, renormalizing the results before exporting the snp file etc. In any case, I am not able to get matching results. Can anybody suggest a solution this problem?
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