Difference maps between similar WMAP and Planck frequency maps. The comparison plots go, by column: Stokes Q for the COSMOGLOBE-produced WMAP and Planck sky maps, Stokes Q for official WMAP and BEYONDPLANCK data products, Stokes U for the COSMOGLOBE sky maps, and Stokes U for the official data products. Top row: WMAP LFI 30 GHz minus K-band, scaled by the synchrotron power-law. Top middle row: WMAP Ka-band minus LFI 30 GHz, also scaled by the synchrotron power-law. Middle row: WMAP Q-band compared to the LFI 44 GHz sky maps, scaled by the synchrotron power-law. Bottom middle row: WMAP V-band minus LFI 70 GHz, with unit scalings for each band. Bottom row: Planck DR4 100 GHz map minus the WMAP W-band also with unit scalings for each band.