  We observe significant, 6.5 - 12%, differences between skyrmion and
antiskyrmion Hall angles in existing experimental data. To account for them,
the Thiele equation is generalized with the transverse velocity component in
the collective coordinate of magnetization vector. The corresponding
generalized Hall angle is formulated, and its consequences are compared to the
data. A plausible physical origin is provided for explaining the Hall angle
differences.
