This link (below) shows a 1994 ZR-1 going through a full detail to bring back the paint finish. It shows what is possible with paint correction and protection. But the pictures do show the car with the Michelin Pilot Sport AS4 tires on factory wheels from multiple angles. This should help give a good idea on how they appear on the car. While a few of the initial pictures have a different set of Toyo Extensa tires, it seems most of the later ones show the PS AS4 in some detail. So it seems there was a change of the tires at some point starting with picture #56 in the process (unsure why). It does allow some visual comparison for those who are curious and want to know the differences (however slight) in the style/appearance (the average person will likely never notice the different look of tires on a car).
Picture #132 shows the width of the 315 rear tires on the car while picture #134 shows the appearance of the 275 front tires on the car. Picture #194 shows the set of 4 off the car.
https://v8speedshop.com/1994-chevrolet-corvette-zr1-nh/
For those interested in the detail and restoration process there is also a video:
https://youtu.be/O4gSLjSvHUc