Ratio between the power spectrum P(k, z) in model-12 and in model-FID (see Table 2). The lines show the predictions from HALOFIT, while the square and triangle symbols are measured from the pair of cosmo-SLICS N-body simulations. Upper (black), middle (red) and lower (blue) lines correspond to redshifts z = 0, 0.6 and 120, respectively. Other cosmologies are shown in Appendix B.