Prose is a form of writing in which sentences have unequal length. Poetry is a rhythmic form of writing which uses fixed length unit (meter) and similarity of sound between words.
Prose is used in writing with a fairly neutral tone. Poetry used to be sung and is associated with emotions.
See the points below!
- No "decoration"
- No line breaks
- Looks like a block of words
- More "decorated"
- Has line breaks
- Shape depends on the length and the intent
The differences between them are always not so clear. But the points that I gave you are generally accepted.
I hope this helps! :D