There were several similarities here -
Both Huntley & Bamber said prior to being arrested, they were the last person to see the victims alive.
Neither person had to tell the police they were the last person to see them alive.
Both killed children.
Both still protest innocence to varying degrees. Bamber as 'not guilty', Huntley saying both murders were accidential.
Both were successful in some areas of the cover up.
Both made big mistakes in other areas of the cover up.
Both told their girlfriends.
Both had girlfriends who were part of the prosecution.
Both were keen to engage with the police prior to being charged.
Both were keen to engage with the media prior to being charged.
Both knew the victims beforehand.