"The Tell-Tale Heart" & "The Cask of Amontillado" outline:

Introduction:

Thesis statement: Although the two stories share a lot of characteristic  the characters  atmosphere and tone are very different.

1st Paragraph:

TS: The main characters in the two stories (the narrator & Montressor) effect the way you look at the story.

SP: "TTH" the narrator is nervous/ "CA" Montressor is confidant.

SP: The narrator is proving his sanity/ Montresser is conversing with someone.

SP: Has no logical reason/ has a more logical reason.

SP: they both have obvious psychological problems.

2nd Paragraph: 

TS: The setting and mood in the two stories are one of the most significant aspects in the story's development.

SP: in the old mans house/ in his pallazo in the catacombs.

SP: Both are in a late hour at night.

SP: full of superstitious thoughts/ full of sweet vengeance glee.

SP: they both state the murder in the beginning of the story.

3rd Paragraph:

TS: The murder plan and success rate are both stories highlights.

SP:  "TTH" plan takes a week/ "CA" in one night".

SP: stalks his prey every night/ psychologically lures him to his own doom.

SP: brutally kills and dismember him/ walls him up and leaves him to his death.

SP: is caught "asylum"/ not caught.

Conclusion:

TS: "TTH" and "CA" are both psychological horror stories about two cold blooded murderers who tell the story without an ounce of regret.
SP: both were kind to the ones they murdered before murdering them. 

SP: share the same theme.

SP: "CA" is more frighting.