First panel: Comparison between the HARPS-N and NEID solar RVs published in Ford et al. (2024). The inset zooms on two months of the data where rotational modulation from active regions is clearly visible. Second panel: Radial-velocity difference between those two datasets that presents an RV rms of 1.3 m s⁻¹. The red curve corresponds to a moving average with a period of 100 days. Third panel: Radial-velocity difference detrended by the moving average that presents an RV rms of 0.79 m s⁻¹. Fourth panel: Moving standard deviation of the RV difference residuals with a window of 25 days to be sensitive to solar rotation.