the uk models are 350z = cloth seat non electric and standard stereo and no cruise control,brembro brakes.
350z gt = leather heated seat ,bose stereo with sub behind drivers seat,cruise contol,brembro brakes.
i think thats right....then theres the import 350z which came as s version t version and st.
cant remember which is which but one came with brembro brakes and one came with leather + stereo etc
and the st had it both.
i am sure someone will be along soon how will know more.
how this is of some help