difference between the way up to heaven and lamb to the slaughter

The way up to heaven:Mr Foster was killed by being trapped in a lift. Mrs Foster planned the murder. Mrs Foster was fearful of being late and Mr Foster always wants to make he worried by making her wait unnecessarily. Mrs Foster's alibi is the driver of her house.
Lamb to the slaughter:Mr Maloney was killed by being hit on his head by a piece of frozen lamb. Mrs Maloney hit her husband without planning. Mrs Maloney always thought that her family is prefect and is too easily contended. Mr Maloney did not want his wife to be too caring as it may affect his career, so, he plans to leave his wife. Mrs Maloney's alibi is sam.
There may be many differences between the way up to heaven and lamb to the slaughter, but they are also similar in many ways. They both show that sometimes women can be very shrewd. It also shows us that we should not try to purposely piss someone off and that we should spent some time with the family, and not think about work or school(or computer games) everytime.