Contradiction with John 12:3-6
In John, it is Judas who specifically criticizes the waste, while in Mark, it is unspecified individuals who express indignation.
John 12:3-6: Then took Mary a pound of ointment of spikenard, very costly, and anointed the feet of Jesus, and wiped his feet with her hair: and the house was filled with the odour of the ointment.
Contradiction with Matthew 26:8-9
Similar to Mark, there is indignation, but Matthew specifies that it comes from the disciples, emphasizing a collective critique rather than the unspecified group in Mark.
Matthew 26:8-9: But when his disciples saw [it], they had indignation, saying, To what purpose [is] this waste?