GT hasn't the best graphics for a racing game in its generation, at all.

[Baroque_Dude]

Username2324 said:

You're comparing a console game from 1997 to a game available on PC in 1998, which is most likely where your screenshot came from.

Nope, I'm comparing 2 PS games. GT was only on PS and NFS III was on PS and PC, as well. Both screenshots are of the PS games.

Username2324 said:

Edit: Too lazy to post, and perhaps not the most reliable source, but on Wikipedia the screenshot for Gran Turismo (PS) is clearly better than the screenshot for NFS III (PS)

In my opinion, no screenshots of GT can look better than a screenshot of NFS III on PS.