Difference between natural killer and cytotoxic cells is -
Cytotoxic T cells have CD8 surface markers and MHC class 1 restriction which can recognise IgG coated target cells
Immunology
Interferon decreases natural killer activity
NK cell has CD4
Cytotoxic cell lyse IgG coated target cells
NK cell contain azurophilic granules
Cytotoxic cell lyse IgG coated target cells