EE (left column) and BB (right column) power spectra of HFI2018 and SRoll2, based on half split data sets (detests, half-mission, and odd-even rings) maps at 100, 143, 217, and 353 GHz. Auto-spectra of the difference maps show the noise plus systematic effect residuals, rescaled to full mission equivalent and corrected for sky fraction used here (43%). The cross-spectra between the same maps are displayed and show the signal. The binning is: δℓ=1 for 2 ≤ ℓ <  30; δℓ=5 for 30 ≤ ℓ <  50; δℓ=10 for 50 ≤ ℓ <  160; δℓ=20 for 160 ≤ ℓ <  1000; and δℓ=100 for ℓ >  1000.