Differences between BEYONDPLANCK and 2018 or PR4 frequency maps, smoothed to a common angular resolution of 2° FWHM. Columns show Stokes T, Q and U parameters, respectively, while rows show pair-wise differences with respect to the pipeline indicated in the panel labels. A constant offset has been removed from the temperature maps, while all other modes are retained. The 2018 maps have been scaled by their respective beam normalization prior to subtraction.