I think there are many ways you could point out a competitor. If a competitor did something different that's notable I think it makes sense to share and explain

I think there are many ways you could point out a competitor. If a competitor did something different that's notable I think it makes sense to share and explain how the OP could learn from that. Sometimes 1-liners like "Checkout xyz, been around since 2014" seem a little like an ad leaching off of the original Show HN. I think it depends strongly on the content and the framing of comment.