Comparison of results from the ParSES spectrum synthesis and the EW method (EW) for the STELLA+SES giant-star pilot sample. The four panels show, from top left to bottom right, effective temperature (T_eff), logarithmic gravity (log g), microturbulence (ξ), and logarithmic metallicity ([Fe/H]). The respective thick red line in each panel represents the mean difference and its ±1σ values (dashed red lines) also given numerically in the top of each panel. The black dashed line is the zero difference line. The dots are the individual target results with their ± 1σ error bars. See text for details.