I don't really think that's true. I mean, the best two best defenders in the league (Doughty and Karlsson), are rarely significantly more valuable than the top 5 centers in the league. Centers drive plays at 5v5 more than any other position. I'd say Matthews pretty clearly has the upside of being the 2nd best center of his generation behind McDavid (if you consider Crosby, Malkin, etc the next generation), and is probably more likely to hit that than Dahlin is to hit being the best defender of his generation. Dahlin has a crazy amount of upside but has significantly more risk, and if both hit there ultimate upside (which Matthews is closer and more likely to at this point), I don't think there is a gap, the 2nd best center every year is probably more valuable than the best defender.If it's pre draft honestly It's 50/50 think i would go with dahlin he's a human highlight wheel and I can't remember the last time a D-man was doing what he is doing at his age. Edge Work, Skating , zone entry's, Hands, shooting, plays Physical and is Super smart with/without the puck he checks off all boxes for me. attitude and work ethic as well the kid is so humble and eager to get better at hockey he wants to be Karlson. Love his kid, Obviously yeah I'm a buffalo fan so I'm bias. If your'e talking empty roster and you have a choice between 3rd year matthews and 1st year dahlin yeah you'd be crazy to not pick matthews but at the same time if a kid has a chance / potential to be the best d-man in the league over a centre who has potential to be a top 5 centre in the league you gotta pick the D-man
Look, I'm a Leafs fan, so bias-creeps in. But, I would apply the same statement I just made about Matthews to Eichel (although, I think Matthews is slightly ahead and therefore has a better chance to be the 2nd best center behind McDavid).