Recently there have been a few instances where, although I don't personally believe something is a duplicate, I mark it as a duplicate to bring attention to the relationship between the questions. More specifically, I mark the question as a duplicate because others may feel it is even if I don't. I'm letting democracy decide.

But in some of those instances, my duplicate marking leads to discussions in the comments about whether or not the question is actually a duplicate.

So, my questions:

* Is this discussion in the comments healthy, or perhaps healthier than the (sometimes knee-jerk) decisions made in the review queue? Or does this discussion (that's not *directly* related to the question) just make our SE a bit messier?
* Should I revert to my old practice of simply writing `Related: <link>` in the comments, knowing that this may make it less easy for others to see the possible duplicate in the review queue?

Perhaps this is a silly question—I'm not sure yet!—but it's happened enough recently that I thought I'd ask.