(note:when i say 'rl' in the following, im referring to 'real life')
I played Enthusia after playing gt3 and 4 for a long time. I was looking for the most realistic driving simulator i could find and i of course hadnt heard of lfs yet. Actually i think in my quest for the perfect simulator i had downloaded the demo of lfs s1 and played it, but the physics were so wildly different from gt3 and 4 that i thought there was no way this could be realistic and dismissed it as sub standard. Just innocent ignorance, wasnt being a 'fanboy'. Anyway, enthusia is worlds above gt4, i thought they butchered the semi realistic physics from gt3 in gt4. Enthusias physics are much more convincing than either gt3 or 4. While i hadnt played enthusia for more than a few months before i got addicted to lfs s2, the one thing i do remember is that, like in gt3 and 4, the way to get around a (tight) corner fastest is to mash the brake in as hard as you can and steer about as hard as you can, which conveniently sends the back end into a nice little, easily controllable, perfect oversteer slide. Braking being like one of the most difficult and important parts of race driving, i was kind of disgusted with the braking physics of gt3, 4 and enthusia once i learned how incredibly subtle you need to be in rl braking (or the more realistic braking physics in LFS, that is).
Also, comparing virtual track times to real life track times is a ridiculous way to try and measure how realistic the games driving physics are in my opinion. I mean... duh, like someone said, there are going to be many variables that will cause differences which are trivial to deciding if a game has a very realistic feel. You simply need people who have raced in reality a good deal to describe which game more closely simulates the act of precision driving. No one know better than them. We all know there are plenty of poser fan boys who like to rant how they drove in the le mans 4 times or that they took there car onto a parking lot once and spun it around a few times and they know gt3 is the closest to reality by far. Honesty can be hard to come by on the internet obviously.
As far as all the reading ive done on the physics of racing, and my limited rl driving experience, lfs is the closest to rl by far.
PS. I heard a quote of Kaz. (the designer of gran turismo series) where he was dissing enthusia. He was saying that konami forgets that they are making a game, and that when you make the driving too realistic its not enjoyable by the average person anymore.
Well, that was the last time i touched the gt games anymore after I heard those blasphemous words come out of his mouth.
