Is there a way to frame "which is better" and "which is the best" type questions so that they are not tagged as non-constructive, overly broad, or inviting nothing but opinion?
Avoid making your question a comparison question. Insead of asking
What's the best way to X or
Which method is better, Try asking
"how do I X?" or even,
"I'm trying to do X, I've looked at both Y and Z and they seem fairly equivalent - is there any reason to use one over the other?"
For more discussion on this, see: Gorilla vs Shark