Comparison between eROSITA, XMM-Newton, and Chandra spectroscopic profiles for annular regions, showing the temperature, metallicity, normalisation, and relative normalisation. The XMM-Newton results are the from the X-COP analysis of Ghirardini et al. (2019), scaling the metallicity profiles from Anders & Grevesse (1989) to Asplund et al. (2009) solar abundance ratios by multiplying by a factor of 1.48 to account for the relative H/Fe ratio. The eROSITA profiles use the same centre and annuli as the XMM-Newton profiles, while the Chandra profiles use wider annuli. Normalisations are the Xspec normalisation factor per square degree. The relative normalisation shows the fractional difference to a β-model fitted to the XMM-Newton data.