Different values of radiomics features between slicer radiomics and pyradiomics

Hi

I got different values of radiomics features between slicer radiomics (GUI) and pyradiomics (CUI).
How could that happen?

I read 5 MR images of brain, created 5 masks of tumor in 3d slicer, and performed radiomics using slicer radiomics (GUI).
However, these values of radiomics in 2 out of 5 cases were slightly different from those that I got using pyradiomics (CUI), on the other hand, other values in 3 out of 5 were exactly the same as those of pyradiomics.
I always used the same parameter file.

I would really appreciate your doing this for me.
Thank you,

TAKEDA