I would assume, based on my limited understanding of the printing process, that the white versions of the angels in Priests have a similar rarity based on the fact that the error would have been made a similar amount of times since they appeared on the same print sheet. I would also assume the same thing for those from the Disciples set. Comparing the errors from the Priests versus those from the Disciples would not be doable without an actual hard count of the cards available versus the cards printed. All of that to say, probably, but I am not sure.
