Value of vas_steering demand using different integrator/formulation

Hello everybody

Can anybody tell me difference of vas_steering_demand value in postprocessor with different solver settings (Gstiff/I3, Gstiff/SI2, HHT/I3)

All simulations are done as DLC with speed 50 km/h with (MDI_Demo_Vehicle)

Results are pretty same (i.e. lateral disp, steering wheel has same angle)

Steering demand during DLC using gstiff_i3

Steering demand during DLC using hht_i3 or gstiff_si2

I do not understand value of steering demand, why is so much different while using hht or si2?

Thanks

Jozef