Accuracy of fly-by-wire and control deflections

[normalperson]

Specifically with regards to the su 27 module, I was wondering how accurate the flight model and visual model are with respect to the flight computer's deflection of control surfaces. For example Prepar3d has a seemingly 1:1 input to output mapping on the f22 and f35, which I don't believe is accurate. On the other hand in Falcon BMS you can visually see downward horiz stab deflection even if the stick is fully aft at high aoa, which I understand is accurate. Hence im wondering how realistically DCS handles this since it seems central to the su27 flight characteristics. Thanks!