Update for the FFB:
I tested some different values on the wheel app and I also set some values on AC FFB effects - they was on 0, the FFB ingame on 100%. So, in that way the difference was easy to feel, the wheel performs much stronger than CSL Elite. I dont know which combination can make the wheel in its 100% of power , but from my test in AC it feels maybe 60-70% stronger. I use "it feels", not "it is" , because someone can show paper specs and state that is impossible to be so stronger and on paper both wheels are very close. But the wheel feels really stronger, sometimes, too strong and you gotta think to hold tight all the time and to do not lower your gard.
After AC I tested rFactor 2 - there the FFB was inverted or opposite on needed for my wheel. I found where to put "-" in JSON file and I made it proper. In rFActor 2 the wheel feels maybe twice stronger compared to CSL E. You dint need to have CSL E wheel to feel that, because you feel power that can be twice stronger from any belt driven wheel on the market ( at least from those I know and not modded ofcourse). You feel how it can be dangerous. For example if you remove your hand off the wheel and wheels shakes left to right - it is impossible to hold it back without hurting your hands and I need to press ESC on the KB to make PAUSE. I am with F1 rim with 4 paddles -if you use leather or alcantara round shaped rim - it will be much easier to grab back. I didnt use FFB multiplier in rFactor 2, just on default settings. I found that in rFactor 2 the game didnt change wheel degree "by car" or even if you set by your wish to be 360 for example it still stays 900 degree wheel. I made a correction in wheel app to be able to drive open wheel car, which with 900 degree steering is impossible to drive.
Back to FFB power , because my bulgarian fellow
@super_gt is power maniac
In FFB with some changes here and there in wheel app I did to be almost uncomfortable to use. For example on the long straight on Nordschleife I checked my phone thinking on a straight is safe and some bump on the road make the wheel to react and pulled the rim from my holding hand
So , not only powerfull , but very fast reactions - this is very interesting combination. Dealing with metal shaft of the motor directly like your wheel steering shaft gives advantage to the motor too - it is metal against your hands. Any belt driven wheel with some powerfull motor/FFB will do some friction on belts, here the metal cant do frictions and it is against your bones and muscles
Now we know the needed power is there - at least for me is more than enough! Thats why most of the people with 20Nm use their wheels on 30-40% power. I really want to see what is 20 Nm on its 100% in rFactor 2. It is hard to explain what is to deal with more power than regular FFB wheel, but imagine you hold some machine in factory when the machine doing operation
And we speak for the smalest ever used motor in DD wheel! I will continue to explore and do some tests. Next time I speak to Ollie I will ask him is it possible to add profiles in the wheel app.
Ofcourse people learn fast and after a week this FFB will be normal for me. Just sharing my first encounters with DD FFB. But no matter that is only 7 Nm - it is clear visible that SW7C have the DNA of its bigger brothers!