Similarities between the manga case "Turnabout from Heaven" and AA6

• Both 6-4 and M-5 involve Soba.

• The victim's name is Buck Wheatley, which is pretty similar to Bucky Whet (This one's definitely a coincidence though, their Japanese names are different).

• Both victims are killed by a food ingredient (Although in Wheatley's case it's from an allergic reaction).

• It's revealed that Diana's real mother is somebody else. This is pretty similar to Rayfa/Amara.

• Diana's real mother disguises herself in a fashion similar to how Amara disguises herself as Nayna.

• Both cases make you think that the mother is the killer at the end, but it's revealed to be someone else.

Is this just a coincidence or did Yamazaki borrow from the manga? He reused elements from the older games in AA5 and AA6 so it's certainly possible.