I still play some Gran Turismo on an emulator or on my PS2 just so I can race the first version of this track. ^^ It's the only one from GT1 (aside from the original test course) that's not in GT6. ...I wonder why. O.o?
SSR11 feels more engaging than a lot of other city circuits. It has a wide variety of corners too (right angles, hairpins, high-speed sweepers, chicanes). The track feels not too wide and not too narrow.
While I'm not opposed to the GT3 version being added, I prefer the GT1 version. Nothing like the threat of a 200+km/h head-on collision to make you stick to the racing line in the underpass chicane. ^^ While the GT3 version also has a chicane at this location, it feels more like a narrow point on a straight than a corner.
Also, in the GT1 version, your approach to the following right-left chicane is much more unstable (and fun ^^) since you would have just come out of a full-throttle left-right S.
One thing I'm not sure about is if the physics engine changes will detract from the fun of SSR11. Since the physics engine has changed so much, comparing SSR11 to tracks on future Gran Turismos isn't completely fair.... maybe. O.o
One more thing, which kinda doesn't matter... I can't see how the roads of SSR11 would be efficient for regular city traffic. O.o?