Why is the f sport rotors hole pattern for the studs bigger then the base 350 rotors

 

They shouldn't be. To my knowledge, the base, F-Sport and F rotors are all interchangeable without the need to modify the hub or studs, only the caliper is different on each.

Which part numbers are you comparing?

 

I had some old rotor that i keep from 2013 gs350 and i notice when i got new rotors for my 2018 gs f sport there was movement back and forth. Where the 2013 rotors had no movement. It was nice and tight . I think that what make my car vibrate