Last thing I'll bug you with for a while!

I have a comment child, and that comment is the only reply to another comment parent.

reply = parent.reload.replies[0]
reply.body == child.body  # => true
reply.id == child.id  # => true
reply == child  # => false

I don't think that you can uniquely identify a comment with just its ID, but if you can get the post ID that they each replied to, then you could compare reply.id == child.id && reply.subreddit.id == child.subreddit.id && post_id == child.post_id (this already works for link posts with link_id but I'm not sure if an equivalent exists for self posts.