It doesn't have to be that way. One sim can simply outclass the other. In terms of physics, F4 certainly did that to GT5. I can't say much regarding GT6 vs FM5. There is no F5 demo for me to try. I have a very small amount of time with GT6 and I'm sad to say that it did not feel as different from GT5 as it was supposed to given all the talk about physics.
But it really doesn't though, it by no means "simply outclasses the other". There are certain parts that are better, certain parts that are worse. Likewise I can't compare GT6 with FM5 as I've only played a few hours of FM5, but it's completely and glaringly obvious that you haven't had enough time with GT6 if you think it doesn't feel very different to GT5. It's completely different in a HUGE number of ways.
Anything more specific than that? What is wrong with it?
Weight transfer under braking and acceleration, gear changes aren't slick enough in automatic, there's not enough body role on cornering - the Scirocco is fairly tight, but it's no lightweight racer and there is significant body role; it's still fairly heavy, when under hard accelration with no traction control on; it wheel spins in third in the dry, it stops halfway through second IRL and you can take corners far faster in game than real life. It's not just the Scirocco though, I used to have the Ibiza Cupra and it's EXACTLY the same story with that. I've driven the Leon Cupra too and that's the same story, as it is with the Honda Civic Type R.
At first I thought it may just be an issue with the physics engine with regard to FF set-ups but I've had similar issues with the Audi S5 too. I drove my mates and by no means is it a light car, it's a heavy cruiser and nowhere near as "nippy" as the Scirocco is, BUT the car literally just doesn't turn in Forza, it's like driving a boat, understeer on every corner.
Unfortunately I've not had the pleasure of driving many other cars, but most FR and MR cars seem much better.
This has me very curious since FM4 was lightyears ahead of GT5 in this area. You're saying that F5 on a new console is now behind? I still couldn't find lift off oversteer in the Fit in GT6. Though I do recall proper weight transfer in the GTA demo so I'm not sure if it's specifically the Fit or the physics engine.
Please see above, FM4 was better with regard to body role than GT5, but from what I've seen of GT6 and FM5; GT6 walks all over it body role wise. There's still a fair few issues with FM5 on FF and F-AWD, although on first impressions it's better, the cars still don't handle like FF and F-AWD do in real life. There's definite issues with GT6 too, but it's just FAR closer to reality than FM is (again based on first impressions).
I totally disagree with you on all points.
1* You say you hate the lack of speed in Forza while forza is the only of these two games that uses a wider VOF and always runs on a perfectly smooth framerate and whereas in GT there where dozens of people complaining about the lack of speed sensation and framerate issues your remarks clearly dont add up with reality. (These two simple facts make your comments null and void)
2* Imo the braking in Forza is a lot more real life and intuitive. I had a lot of issues with braking in Gt where the rear of the car without any feedback just spins out on you.
3* Fyi the Ai is and has been better than Gt's ever since Fm2.
1* There aren't "dozens of people of people complaining" there are a few. A very small minority. I've not met one person that says there's a lack of speed sensation, but framerates have been said by the minority. These simple facts mean that my comments are not "null and void" but are my opinion and the opinion of others that I've played with.
2* I said the braking in Forza is better - what's your point? GT6's braking doesn't work like reality, you turn ABS off, slam on your brakes and you can still turn. That doesn't happen in reality. For some reason there's no need to pump your brake pedal - which is really bizzare. There's also no judder through the control when you're scrubbing off speed. Like I said, Forza's braking is better.
3* FYI, your opinion is not a fact, you can't just make a statement and expect everyone else to just agree with you. I think they're both pump. FM2 and GT3 were about the same. GT4 was MUCH better in the AI department than 3 and was better than the FM equivillant IMO. But then the last two FMs have had better AI than GT. It doesn't make it good though, both are rubbish.
. I completely disagree though. I've played both extensively and they're both as good as each other just in different ways. Like I said before, I hate the lack of feeling of speed in FM. It ruines everything that I enjoy about the game. It does have good physics, for instance I think the braking is better than in GT. But other things like body role and differences in drivetrain layouts aren't as good as in GT. Both have woeful AI.
The 1st corner exit is in 2nd gear, and the rear tire has good traction, feels like what a factory tire would do on stock Supra 
Did you actually drive it in GT6 ? It does not drive like on ice at all, this it not GT5 anymore 
