Formal uncertainties (σ of gravity field coefficients for the combined 2W and SST mode is shown with and without empirical acceleration, alongside the reference model. Red and blue squares denote the positive and negative values of the reference J_n coefficients, respectively. The inclusion of empirical accelerations improves alignment with low-degree gravitational signals influenced by empirical acceleration but increases formal errors due to parameter correlations. At higher degrees, where localized gravity dominates, the impact of empirical acceleration diminishes. No a priori constraints are applied, emphasizing that improvements stem entirely from the data.