How is Poes word choice different than Byrons, English homework help

She
walks in Beauty, like the night Of cloudless climes and starry skies;
And all that’s best of dark and bright Meet in her aspect and her eyes:
Thus mellowed to that tender light Which Heaven to gaudy day denies.

One
shade the more, one ray the less, Had half impaired the nameless grace
Which waves in every raven tress, Or softly lightens o’er her face;
Where thoughts serenely sweet
express,
How pure, how dear their dwelling-place.

And
on that cheek, and o’er that brow, So soft, so calm, yet eloquent, The
smiles that win, the tints that glow, But tell of days in goodness
spent, A mind at peace with all below, A heart whose love is innocent!

Helen,
thy beauty is to me Like those Nicean barks of yore, That gently, o’er a
perfumed sea, The weary, wayworn wanderer bore To his own native shore.

On
desperate seas long wont to roam, Thy hyacinth hair, thy classic face,
Thy Naiad airs have brought me home To the glory that was Greece And the
grandeur that was Rome.

Lo! in yon brilliant window-niche How
statue-like I see thee stand, The agate lamp within thy hand! Ah,
Psyche, from the regions which Are Holy Land!