Lyric discussion by Grand_Marquis 

Cover art for The Age of The Understatement lyrics by Last Shadow Puppets, The

the "dumm du-d-dum du-d-dum du-d-dum" is actually a fairly common chord progression for up-tempo musical styles inspired by Westerns. Which both this and knights of cydonia are.

Beyond that, there really isn't much of a similarity. Knights has a single verse, followed by several progressively complex variations of the same refrain. The inspiration is clearly 80s power metal - with its epic declarations of freedom and so forth.

Age of Understatement is more in keeping with a thematic poem you would normally see accompanying this kind of music post 1960s.

One thing about this song is the lyrics are surprisingly layered and non-obvious in their intent. Aside from Tool and a couple Indie singers, you really don't see that very often.