PYTHIA 8 predictions of the jet axes difference distributions for $\Delta R_{\rm STD-WTA}$ and $\Delta R_{\rm WTA-SD}$, where the Soft Drop parameters are $\beta=0$ and $z_{\rm cut}= 0.1$ or $0.2$, in $10< p_{\rm T}^{\rm ch jet} < 20$ GeV/$c$ . The top panels show the normalized distributions. Left: D$^0$-tagged jets compared to inclusive jets. Middle: D$^0$-tagged jets compared to gluon-initiated jets. Right: D$^0$-tagged jets compared to light-quark-initiated jets.