Comparison of the models with different physical ingredients. Upper panel: comparison of the r₁₀ (left) and r₀₂ (right) frequency ratios obtained by varying the physical ingredients and without overshoot. The model with the GN93 abundances stands out slightly. Lower panel: comparison of the r₁₀ (left) and r₀₂ (right) frequency ratios obtained by varying the overshoot parameter. The model labelled AIMS, ratios is without overshoot. There is no visible difference between the blue and orange symbols in the lower left panel. Orange and green symbols are also largely superimposed in the lower right panel.