Real Life There is a Respect for the Limit. You don't push your car to the absolute limit every time you are on a track. In GT we can pass the limit wreak,and hit restart. In real life the day is done, or your life might be over. You approach the limit and push the car a little harder the more comfortable and familiar you get withthe track.
In Real Life, NO Driving Line to show how to drive the track what side to enter corners, when to brake and accelerate.
In Real Life there is no shift point indicator and gear predictor telling you what gear to drop to and when to start braking/downshifting.
In Real Life there is no ABS stability assist
In Real Life there is no HUD
In Real Life time on the track is limited, and breaking the car requires repairing. There is no driving until your time is where you like it with endless hours of laps. You have a very limited time to put down a lap, with no unrealistic assist.
In Real life dirt, dust, rubber, the track surface is always changing and is somewhat different from day to day in GT its the same day everyday and the cars run perfect, the track is exactly the same.
Real Life things are always a little different & if your using any of the assist in GT including driving line, suggested gear & HUD for endless numbers of laps, restarting every time you push the limit too far, or no damage anyways, so just keep on going until you get that lap time your after, it's not very comparable to real life.
In real Life much of racing is in plotting braking points and adjusting these to the changing track conditions. Using the assist in GT kills much of what makes racing, racing. Its cool being all supper fast, but most people use one assist or another to be as fast as they are... When any are used they are not driving as the guy drove in Real Life, partly why comparing lap times is so comical.