LTTS vs The Way Up To Heaven

Both stories share similarities and differences. For the similarities, both are stories of couples and the wives in both stories are loving, caring and loyal to their husbands, who take them for granted and tries to save only their job and money while not caring for their wives. In the end, both wives murdered or did not save their husbands from danger on purpose but made it look like an accident so noone would suspect them.
Now for the differences. The method of murder is different and in one story, the situation is actual murder while in the other, it is not rescuing her husband while he is in danger. Also, one story has a timespan of one day but the other story lasts more than one day, even more than a month.