Variation of the X-ray count rate in the 0.2–5.0 ke V band between eRASS2 and eRASS3 for the M dwarfs in the TESS SCVZ. Left panel – all stars, right panel – zoom into the low count rate region. The lines denote equal count rates in both surveys (solid) and differences of a factor two (dashed). The X-ray brightest stars (Eq. (1)) are high-lighted in red, the most X-ray variable (Eq. (2)) in green and stars that fulfil both critera in lime. See Sect. 3.4 for details.