You've never been behind the wheel of a car nor observed one have you? You cannot say all cars are easy to turn and you cannot say cars slipped when they turned in IV because that is subjective. In the real world, if you are speeding hard into a corner and then steer, you will feel some slip most of the time and you will too in IV, precisely that is the only time you would in IV. When you drive like a normal NPC in IV, turning is easy. Same in real life if you turn like a safe driver. But you are saying it is unrealistic for a car to slip whilst turning in IV but you are probably basing that off of an observation that involved said car in IV speeding. Comparing that to turning into a corner safely in real life is rubbish.
The turns in GTA IV are not realistic, a real car makes turns fast and doesn't feel like you are slipping off the street or driving in snowy roads , it almost makes you feel like you are driving a boat and also how is a car supposed to slip in good streets. that is not very unrealistic. Especially if the car is heavy and they seem to be manual as well. In GTA V the turns are more realistic and the lack of weight depends on the car you have and cars are better in drifting. GTA IV is more realistic when it comes when it comes to damage, but that's it. As far as the driving difficulty in GTA IV, I've never really had a hard time getting used to the driving, it was easy. So I don't feel like I accomplished nothing.
The only thing V is more realistic at, from my experience, is... not going to lie there isn't really anything I can think of.
From my experience, IV is more like driving in real life. The lack of weight shifting in V is odd because if you observe the way cars steer in real life, you'll see body roll is prevelant -- boatyness in other words, lol.
And in real life, try to steer into a corner at a high speed in a basic car, muscle car, or heavy luxury car. It will slip. Of course Ferrari's can, but not always depending on the conditions, have more grip and slip, as well as some other modern performance cars that aren't really torquey like AMG's or Continental GT's, but comparing those to an average car in IV? How ludicrous.
What I meant was safe turns not fast speed turns, also you clearly haven't read my other posts in which I gave I made some corrections. I like both handlings in each of those games for reasons stated.