Intraday RV rms on the left and RV rms of data binned per day on the right for each spectral order. Blue dots corresponds to an analysis of the HARPS-N solar data presented in this paper, and green dots to the analysis of the NEID solar data shown in Fig. 5 in Ford et al. (2024) (data courtesy of Eric Ford). The left panel focuses on short-term precision and was obtained by removing from each day of observation its daily mean, and the right panel focuses on long-term precision, dominated by the long-term systematics induced by the solar magnetic cycle. For the intraday analysis (left panel), we should compare the green NEID data with the HARPN red dots labelled HARPN/$\sqrt{5}$ that corresponds to the blue dots divided by the square root of five. This allowed us to compensate for the S/N difference between HARPS-N (S/N ∼ 300 over 5 minutes) and NEID (5 observations of S/N ∼ 300 over 5 minutes) solar data.