Poetical vs Metrical - What's the difference?

As adjectives the difference between poetical and metrical

is that poetical is of or pertaining to poetry, suitable for poetry, or for writing poetry while metrical is relating to poetic meter.

* poetic

(en adjective)

of or pertaining to poetry, suitable for poetry, or for writing poetry.

expressed in metrical form; exhibiting the imaginative or the rhythmical quality of poetry.

(Webster 1913)

(en adjective)

relating to poetic meter

having a regular rhythm

of or pertaining to measurement

* metrical structure