comment about

comment about (someone or something)

To speak about a particular person or topic. The young starlet refused to comment about the rumors surrounding her latest movie.
See also: comment
Farlex Dictionary of Idioms.

comment about someone or something

 and comment (up)on someone or something
to make a remark about someone or something. There is no need to comment upon this event. Please don't comment on Liz's problems.
See also: comment
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • comment about (someone or something)
  • comment (up)on (someone or something)
  • lurker
  • lurk
  • snide
  • snide comment
  • no more than I have to
  • as an aside
  • keep (someone) on ice
  • oh really
References in periodicals archive
According to (https://uk.celebrity.yahoo.com/gossip/omg/harry-styles-posts-a-rude-comment-on-bandmate-niall-horan-s-instagram-photo lol-140949726.html) Yahoo Celebrity , the "sit on your face" comment if unexpected from Harry as the curly haired cutie has not spoken to his bandmates via social media "in about a gazillion year." The website also notes that Harry has never sent out Birthday or Christmas wishes to his bandmates on social media so it comes as a bit of surprise that he made a naughty comment about Niall.
I have a final comment about another dimension of difference between the examples, one with rather interesting philosophical implications.
It is in relation to a comment about Piero that Michelangelo seems to have misread Condivi's text while discussing it with Calcagni.