Comparison of photometric and spectroscopic galaxy member samples across the six LoVoCCS clusters used in our case study. Left: g-band magnitude distribution. Middle: u-band magnitude distribution. Right: (u − g) color distribution. The histograms are normalized by sample size to show relative fractions. Galaxies with spectroscopic redshifts (orange) tend to be brighter and redder than the full photometric sample (blue), suggesting that spectroscopic samples preferentially include red sequence galaxies.