Mean differences (solid) and standard deviation (dashed) as a function of the optical depth τ_c between the original (MHD simulations) and inferred (M-E inversion) physical parameters: magnetic field strength B (left), inclination of the magnetic field with respect to the line-of-sight γ (middle), and line-of-sight component of the velocity v_los (left). Red, blue, and green colors correspond to the VFISV (Sect. 4.1), ASP/HAO (Sect. 4.2), and HeLIx⁺ (Sect. 4.3) inversion codes, respectively.