I was curious so I added it all up and when I was done I thought it was worth posting. I'm sure we're all aware that the Leafs core doesn't have playoff experience, but that gives it a bit of context.
And I'm not even convinced it's a good or bad thing for either team. BOS is struggling a bit and needs to "flip the switch" so to speak. Do experienced teams really have an advantage in that regard? Yes, some vet teams can save something for the playoffs, they know when it counts, but I've seen - across multiple sports - just as many vet experienced teams failing to turn it on 'cause they're calm and poised and can't get those juices flowing for the extra gear. They know the dangers of getting too up or too down, but sometimes you need that emotional jolt to get your team turned around and I find vet teams can struggle with that.
Similarly, inexperienced teams go both ways. BOS could go up a gear and just shock the TOR players with the intensity they haven't seen before, we've all seen that plenty where a young team just needs to get a taste of how competitive it is before they learn how to play playoff hockey, but if a young team can harness their nervous energy productively and play with that fearlessness that only naivete brings, they can wreak serious havoc too.
If I had my druthers, I'd lean towards rooting for the experienced team, but it's not a be-all end-all stat by any means.