I like how ootori drew both of them with the outfits they wore in last years calendar and how Kisaragi would be drinking alcohol while Mutsuki wouldn't. I also like how ootori gave Kisaragi the same amount of "growth" she had in the calendar as well. Kisaragi's hair ornament is in the wrong place but since it's New Year's and not Setsubun she doesn't need to wear the oni horns headband and thus she can wear her hair ornament normally.