Well, it was who was a better addition to two rebuilding teams, not who the better player is. For a team in a rebuild I'd take Trouba over Subban every day of the week.Aside from one season (where overall it was quite comparable) Subban has been a far better player than Trouba. I think it’s more outlandish to claim Trouba is a better player than Subban.
I like the start Trouba has had though. It certainly makes the discussion more interesting.