Not really as the 911 is a iconic car while the Z is a collectible sports car.
Only the 911, Corvette and Miata have hit high volume long life icon status.
Even with the 911 the focus is Air Cooled with collectors.
For the Z the older the better.
The rest are cool and good sports cars but their short lives and low numbers are just a limiting factor.
The Z will come up in value in some trims but even my Fiero today is worth more than new.