What are the similarities between "The Catbird Seat" and "A Jury of Her Peers"?
Irony is device shared by both of these short stories. In both stories, the extent of the irony is not revealed until the end. In The Catbird Seat, we realize at the end that Mr. Martin has carefully pulled Mrs. Barrows into a trap, taking advantage of Mrs. Barrows negative qualities. Until the end, it seems as if Mr. Martin is planning to kill Mrs. Barrows, but this turns out not to be true. Mr. Martin, however, does manipulate the situation to achieve his ends - that is, getting rid of her -- and the owner of the company believes Mr. Martin because he has been a trusted employee for so many years and the things Mrs. Barrows is accusing him of are so out of character for him.
In A Jury of Her Peers, things are also not what they seem. There is a lot more to Minnie Wright than people realize, and it does not come out until the end of the story, when the little canary is discovered. The canary could prove motive for Minnie strangling her husband, but the women realize what a miserable life Minnie must have had, so they do not tell the men about the canary.