The main similarities of these two poems are :
1) they both bring melancholic mood to readers, which is shown in the lines below
''And I wish that I had died" from “The Weary Blues” from and ''we die soon'' ''We Real Cool”.
2) these poems both reveal theme of jazz.
When reading this works you can feel the music hidden in the lines. That makes these poems to balance between happy and sad moods - they are realistic.