Okay, so the tires simulate belted bias ply tires. They are not radials by any stretch, but they are not as sloppy as full bias ply. So here is the depth as I understand it from my research in as layman as I can get so that everyone can understand (I am not saying you can't, but as a general PSA for everyone from all kinds of backgrounds). Bias ply tires tend to flex dramatically under heavy loads, like trying to throw a ton and a half of steel with a 600lbs engine over the front wheels into a corner at speed. This flex leads to a very heavy feeling until it becomes too much from either too much speed or too much input on the wheels, at which time the grip drops dramatically. A belted tire adds literal steel(or fiberglass in the polyglas tires represented here) belts into the tire to give it rigidity and help maintain shape better under heavy load(why it has been used on trucks for ages). This does little to nothing for the progressiveness of the traction loss. In fact it probably makes it worse. A radial on the other hand is more uniformly supported due to the construction so that when you start to scrub it holds grip longer and will have a very progressive feel to it.
No there are no other cars in assetto that I know off where someone has taken the time to make bias ply tires, let alone belted bias ply. So it will not feel like other cars.