Top panel: mean values plotted against Ω_core. Black error bars show the standard deviation σ of the values, and green error bars show mean of the σ_grid values. Lower panel: σ and values plotted as a function of Ω_core. The mean of the values is shown to increase as Ω_core increases. The σ also increases with Ω_core, however the exhibits a flatter trend. At Ω_core ≤ 5%, σ is almost constant suggesting that the intrinsic scatter between the two methods is σ = 0.04 dex.