There isn't any roadcars in iRacing, all of them are trackday or racing cars. With the arrival of the McLaren MP4-12C GT3 you can compare both of them, maybe I renew my iRacing account for this too, since I got a code for it - 3 month for 1 price for everyone.
What is GT feel? I have newer tried PD games, since GT4
Grate cars ruined by iRacings ''you will die if you cross the limits'' tire physics
Try to drift both cars in that big empty circle test polygon, even with super fast rack (tried with 480 degrees) it's impossible to catch a slide, no matter how fast you turn the wheel
RWD feels as if it is on slicks at times. While you can drift out of the corners quite easily (which is what I think Jack was saying), you can't exactly hold a drift for a very long amount of time, let alone initiate a decent drift to hold.