With a nod to pedantry:
In the case of RBS the disk loading is a factor, so being heavy or manoeuvring will have the same effect.
A win for aerodynamic forces over hydraulics is the cause of jack stall (aka servo transparency), again disk loading is a key factor.
In RBS the rotor is no longer flying properly, in jackstall the rotor is still flying but the controls can no longer overcome the feedback forces. Whilst similar I do not believe that they are the same, particularly where the rotor has a high hinge offset and phase angle is well off 90 deg as the effect of RBS will not be "textbook" and will be different to "jackstall" in the same type.
GA