IMHO Game 1 will be a big feeling out game. These teams haven't faced each other since January 2000 (pre covid stoppage). Just a few personnel changes since
Montreal has a bunch of rust they may have to shake off after a week off. Vegas will have three days of rest from the previous series.
Looks like games in Vegas will be 6pm PT and in Montreal 8pm ET
Vegas is the "best team in the league" (by record) who remains in the playoffs. Montreal squeaked into the playoffs at the division 4th seed.
Travel could be a factor. Although they haven't done it for more than a year, Vegas may be better prepared for cross-continent travel (but Montreal actually had more multi-time zone travel this past season).
Injuries? Who knows.
I expect Vegas to come out hitting hard on Monday.