GTS tyre model is at least a generation behind Forza 7. Last time I checked it still didn’t model tyre pressure appropriately. Not to mention all the other odd issues that crop up at low speed and at the limit. I find it surprising that anyone would consider it ahead of Forza 7 at all due to these issues (even Tyre pressure alone). It seems like it’s an evolution of the true model in GT3 to be honest.
What's the source for this? Absolutely everywhere I've seen, they have been regarded as roughly equal, and I personally feel FM7 is more realistic.
As someone who has GTS on PS4 and F7 on PC... Forza is a fucking joke with wheel. If you set it on simulation car behaves like bathtub full of led and you can't recover it at all regardless of type of drivetrain or tires compound.
It got to the point where people set it up to normal just to get closer to actual car physics. And that is improvement over previous Forza games as those had even worse wheel support.
Best example of Forza lack of simulation is that it doesn't actually simulate bumps in the road. I think they claimed multiple times they laser scan tracks but it must be horseshit because regardless how you set up your wheel road unevenes is never transfered to wheel where in GTS or any other sim you can feel on wheel that you are driving on uneven pavement. That is one completely missing part of simulation but there is more. Force Feedback is few levels below competition. Hopefully with F8 they may improve wheel support especially since they started it with F7.
Simply put "simulation" mode works only on pad because if you play with pad you have instant left right and game also autocorrects your input which makes recovering from slides possible. That doesn't work on wheel because game switched off those corrections and lies out proper raw simulation and that simulation fails. You can take 50/50 mass ratio car and it will slide out like old porshe with most of its weight in back. Cars like RX8 which are amazing to slide in behave like bathtubs full of led on one side. To slide with wheel you have to set up wheel to low angle like 180 to have instant response which defeats whole purpose of wheel.
Tyre pressure can be as simulated as it wants but it won't fix whole thing being broken when rest of parts don't work like they should.
GTS has its own issues like mentioned lack of slip on edge but this is mostly due to compounds in game, GTS is heavily focused on racing which usually uses slicks which have almost no slip on edge, the less grippy compounds were always hit or miss. F40 in GT5 on N1 drives almost the same as F40 in assetto corsa but take something like BMWm3 and it was very different.
That being said. Forza 7 is better
game than GTS because there is simply more things to do in it. On other hand GTS is first console game that has actual racing in it. You don't know what racing is until you drive in cavalcade of cars bumper to bumper exploiting eatch other mistakes, doing feints, defending your position or attacking position. Racing in other games is basically attacking blind on AI which does absolutely nothing. It is time trial with obstacles not racing.
So they both have different places they sit in and don't really compete with each other. Forza 7 sits in old GT spot while GTS went and tries to compete with something like IRacing.