Comparison between observed peak abundances with respect to H₂ and the modelled ones to the a) south and b) west, where H₂ column densities were derived from dust (thick filled bars) or C¹⁸O emission (thick unfilled bars). The peaks are taken from the profiles shown in Fig. 12 and are normalised by the value for CH₃OH to obtain R_obs. The position of the peak can differ between the COM and methanol in all four cases. The peaks with respect to CH₃OH in the models, R_mod, are taken from Table 17 in Garrod et al. (2022), where we use the values of the slow warm-up model. Thin bars show the ratio of modelled abundance peaks and observed ones Observed abundances are with respect to H₂ derived from dust (filled bars) or C¹⁸O 1–0 emission (blank bars). Modelled peak abundances are taken from Table 16 in Garrod et al. (2022) and multiplied by a factor 2 to roughly convert to abundances with respect to H₂ (from total H). All values are summarised in Table 3. Arrows pointing downwards or upwards indicate upper or lower limits, respectively.