It's very similar.
Ni kune kantis = we sang together
Ni komune kantis = we sang as a group
"kune" is a bit simpler, a bit like being next to each other, and "komune" more about the feeling of being parts of a greater whole.
sung vs sang
to me the distinctions unclear
been speaking english "for days"
but now im struck with great fear
if i need to translate a phrase
seems i need a dictionary at hand
and edit it twice for the program to understand
if understanding is key
which i think chompsky would say
then quit being a pain in my knee
you obviously programmed it that way