Kakko will probably have the better rookie season as he’s much more physically mature than Hughes. Unless Jack bulks up significantly this summer, he’ll have a hard time at first. Hughes will probably be the more valuable player long term as he’s a natural centre. Note: more valuable doesn’t necessarily mean statistically better.
As for Subban and Trouba, I’d give the edge to Subban. Despite a down season, he remains one of the league’s premier defensemen and will have plenty of opportunities to show that again next season in New Jersey. Trouba is still awesome though.
Voted the Devils duo but it’s super close and the poll results reflect that and in the end, it all came down to personal preference.