Comparison of the 3D [CII] power spectra at z = 6 from various models. The lengths are in comoving units. We also indicate the corresponding projected angular wavenumber at z  =  6 as the upper x-axis. The x-axis range corresponds approximately to the scales, which will be probed by CONCERTO. The solid red and dashed orange dashed lines are from the SIDES simulation assuming the DL14 and L18 relations, respectively. The long-dashed brown line is the high-SFRD version of SIDES (see Sect. 2.7). We also compare with the models of Yue & Ferrara (2019, two-dot-dashed purple line), Chung et al. (2020, dot-dashed green line), and Yang et al. (2022, dotted blue line).