Is there significance in the parent commenter saying "UFO" and the child comment saying "aliens"? Asking because they are not necessarily the same thing and sea

Is there significance in the parent commenter saying "UFO" and the child comment saying "aliens"? Asking because they are not necessarily the same thing and searching for one may not yield results for the other. I suspect both terms would catch the eye, so this still seems like an interesting contradiction; probably just a difference between the comments that I noticed.