Not raced cars but raced motorcycles and the very real difference is the vast sensory overload when you’re approaching corners, while in traffic, late braking trying to overtake, trying to stay in the power, being in the right gear, while protecting. By the way all of this is on the edge of your ability, you walk a line crossing back and forth between triumph and catastrophe. The heat is a very real thing and really wears you down physically and mentally. While physically able there were times I approached corners in traffic at very high speeds when my brain felt overloaded like I couldn’t process quickly enough everything that’s happening. My speed was more limited by my brain getting used to the speed than it was to ability to lean, apex, etc... In the real world there is physical danger and real significant consequences to making a mistake. A mistake can end your life. In a game you just lose.