Comparison of EPIC pn 0.3–0.9 keV light curves of Tormund (top panel) and eRO-QPE1 (bottom panel), binned at 1000 s. The first part of the eRO-QPE1 observation was not plotted in order to align the light curves horizontally. The shaded area in the upper panel is after the end of the observation. This shows the similarities between both objects, at least in terms of rising timescales.