Normalized histogram of the difference between PR3 and SRoll2 maps of the EVPA difference between 353 and 217 GHz ( for sky pixels of all, control, and target1. For most pixels, the results agree within ~ ± 5°; however, pixels of target1 exhibit larger differences between map versions, centered at 2.3°. This suggests that the sky area covered by our target1 sample received more correction from the systematic cleaning. A similar picture is obtained considering target2 instead of target1.