Correction! The 240Z, 260Z, 280Z, Fairlady, 432 etc etc, both 2-seater and 2+2, are all of the Nissan S30 family.
Others may disagree but my observations over 37yrs of ownership and car club membership are that the 260Z is somewhat better built and more refined in several respects over the 240Z.
To each his own. I like them all. Enjoy your purchase, you should have a lot of fun with it.