Gain in magnitude of a P-WFS with respect to an SH-WFS (Δ_MAG) in a limited SR regime, as a function of the maximum radial order that can be corrected by the deformable mirror. Solid lines represent the computed gain for different wavelengths, with a 0.1 μm separation between each of them. The extreme wavelengths considered are displayed in green (λ = 2.2 μm) and red (λ = 0.5 μm), being the correspondent D/r₀ parameters 52 and 310, respectively. Dashed lines represent the maximum slopes of the curves.