I was born in 87, so the 70s were not in my lifetime and I was too young to watch the early 90s Bourque/Neely teams.
So for me it is just a comparison between this team and the 2011-2014. Let’s pick 2011, since they won the Cup.
Forwards
Zacha Krejci Pastrnak v. Lucic Krejci Horton (Tough call, Pasta is by far the greatest star here, but I think young Krejci might have been better than the current one, and the 2011 wingers were his perfect complements)
Marchand Bergeron DeBrusk v. Marchand Bergeron Recchi (advantage 2023, I prefer DeBrusk over 43 years old Recchi and current Marchand over rookie Marchand, Bergy is Bergy)
Hall Coyle Bertuzzi v. Peverley Kelly Ryder (advantage 2023, the 2011 line were important contributors, but I think the 2023 line has much more skill)
Frederik Nosek Hathaway v. Merlot (I can’t pick one)
Extras Foligno (assuming he gets healthy) v. Seguin (as much as I like Foligno and appreciate what he brought this season, I don’t see him coming in and singlehandedly winning us a game, which Seguin did in game 2 against Tampa).
Defense
Orlov McAvoy v. Seidenberg Chara (slight advantage 2011)
Lindholm Carlo v. Ference Boychuk (clear advantage 2023)
Gryz Clifton v. Kaberle McQuaid (about equal since Boston Kaberle was not the same as Toronto Kaberle)
Goalies
Ullmark v. Thomas (about equal in the regular season, obviously Thomas delivered in the playoffs and Ullmark still has to prove himself)
Swayman v. Rask (about equal too)
Putting them side by side like this (and without the hindsight of knowing how each of their playoffs goes), I would pick the 2023 team without hesitation.