Mass uncertainty in the follow-up blind tests vs. configuration (see Table 3 for details) for ΔT_spot1, 1 M_Earth (red), and 2 M_Earth (green) for the WGN of 0.09 m s⁻¹, G2 stars, and for PHZ_mid. Arrows highlight configurations that include the AR contribution. Other symbols correspond to other specific configurations: a higher level of supergranulation (stars), a six-month gap instead of a four-month gap (diamonds), a noise level of 0.17 m s⁻¹ (triangles), and a noise level of 0.45 m s⁻¹ (squares), with the same colour code for the mass (three identical symbols are used for all PHZ values to simplify the representation).