Not really a question that can be answered straight up IMO. I can give you my experience of making the recent switch to PC Sim racing from years of GT with a wheel. The biggest difference between the two is that you can really tell what's happening with the car in AC. GT feels relatively dead by comparison. In AC you can feel and hear understeer and oversteer, you can feel the loss of grip and when it comes back. You can also adjust a plethora of options regarding that FFB and also your view in the game and the mix of sounds and these things are all important IMO when it comes to knowing what's going on with the car. For example, I did an 18 lap race in a fairly large field last week without ABS on street tires and I adjusted the sound balance so I could hear the tires better and picked up a half second just by being able to better hear when the tires locked up.
For me, when I can really tell what's happening with the car, they become easier to drive because I can more easily feel the limits. Because the physics are more realistic, you can actually make inputs that work as they are supposed to. In GT for example, one of the keys to being fast is managing brake release oversteer. First you brake unrealstically with full on brake power with ABS on and little chance of the front end giving too much bite and oversteering the car.Release the brake and if the car is set up right, the back end breaks loose when you release the brakes, and a nice controlled power drift on exit maximizes early exit and speed for lower lap times.
In a sim there is no brake release oversteer, and braking on entry with or without ABS can induce both over and understeer depending on your entry speed, brake pressure and if you are turning the wheel or not. Smooth controlled braking is followed by brake release which gives most cars a very neutral to slightly understeery feel just like in real life and then smoothly power out for earliest exit speed. At all times, the car does what it's supposed to do based on real life physics, and for me at least, that makes cars easier to control because I'm not thinking about unrealistic videogame inputs but rather realistic, real driving inputs.
Unlike in GT most of the time, turning the wheel mid-corner affects the car. It might induce understeer depending on your speed, tire temperature, the track etc. It might induce oversteer depending on the conditions. Touching the brakes mid corner with ABS on, unlike in GT again, dramatically affects the balance of the car. Stab the brakes mid-corner and you'll likely spin, because you'll pitch the weight forward, increase the grip on the front tires and decrease it on the rear. Key thing is, you'll know exactly what happened and why, and be able to avoid it happening again through the proper inputs.
The transition took a couple of weeks to really get comfortable but I can't see it being easy to go back to GT physics.