Marginalised 1σ errors on the model parameters relative to their corresponding fiducial values, for JBD (case 1 in blue and case 2 in cyan), nDGP (case 1 in green and case 2 in light green), and KM (case 1 in red and case 2 in light red). We show the marginalised 1σ errors for GC_sp in the optimistic (dotted area), pessimistic (dashed area) and quasi-linear (filled area) scenarios (top panel), for WL+XC+GC_ph in the optimistic and pessimistic cases (central panel) and for the GC_Sp+WL+XC+GC_ph in the optimistic and pessimistic cases.