Boston is the 5th oldest team in the league and Toronto the 14th. The age of the cores is more relevant to longeivity anyways. Regardless there is no point trying to predict when the end will be for this Bruins core...I am sure it will happen eventually but who the f*** knows when.
Under 30 cores:
Forwards: Matthews, Marner, Nylander vs Pastrnak, DeBrusk, Zacha
Pasta cancels out one of Matthews/Marner but obviously Bruins are short a big stud up front to push Zacha's name off this list as he is only there because Boston is short on names. Bruins are just deadly old up the middle. Its a problem.
Defense: Rielly, Lily, Sandin vs McAvoy, Lindholm, Carlo
Only Colorado can compete with Boston's D core. McAvoy and Lindholm are both upper half #1D and Carlo has re-established himself as one of the premier shutdown guys in the game. Rielly is flawed and miscast as a #1, Lily and Sandin are both young guys with potential be be good top 4 guys, but are analogous, at best, to DeBrusk and Zacha on the Bruins forward core.
Goaltending: Murray, Samsonov vs Ullmark, Swayman
Obviously, goalies are voodoo, but I think there are a higher percentage of flat earthers than folks that wouldn't take the Bruins tandem long term over Toronto.
Boston's under 30 forward core is better than Toronto's under 30 D core. And Boston under 30 D core is at least comparable to Toronto's under 30 forward core. Both are clearly elite. Boston and Toronto have had very different luck with goaltending over the past couple decades, and while Matt Murray has played pretty well, he has been worse than Boston's backup goalie.
But, not gonna lie, finding an elite #1 center without tanking out is hard and the Bruins will have to find one to keep pace with Toronto.
But, you could also understand why Boston would be an attractive place for a UFA to place next to Pasta with a good D group and goaltending in place. Grabbing a good #1C from the trade or UFA market is Boston's Obi Wan Kenobi... our only hope.
For Toronto, it is amazing that the young forwards have really bought into playing with structure and team defense. Amazing. This Toronto team is DIFFERENT than the previous versions of Toronto. They are scary. But... the personnel on the blue line is still really short that guy at the top that pushes everyone down into the correct roles.
So I dunno. In the long run Bruins will need a #1C. And Toronto needs a #1D already. Its probably easier to luck into a #1D in the draft than a #1C and its probably easier to have D by committee. But, I also don't think its really as cut and dry which if these teams has the better future as Toronto fans think.