Grey lines show the relative difference between the MGP emulator prediction and the expected values for the full test set, as a percentage difference. The blue and green lines are the median of those deviations for the MGP and IGP models, respectively. The black dotted line corresponds to a 1% deviation. The red dotted line shows the median of |σ/ξ^true| as a percentage. Here, σ² is the cosmic variance computed for the Planck 2018 cosmology and median HOD.