This measurement was done on the same Really Right Stuff TFC-14 tripod that the first axial torsion spring test was done on.  That test showed an axial stiffness of $655 m^2/s^2$.  Here we can see that the radial stiffness is nearly four times higher, at $2456 m^2/s^2$.  This results in an oscillation frequency nearly twice as high and most importantly, angular deviations nearly four times smaller than we would see compared to the same forces about the axial direction.  The damping constants for the two directions are similar, indicating that vibrations would take similar amounts of time to die out.