They're each in Stanley Cup Playoff position one month into the 2014-15 season, separated by two points in the Atlantic Division. With a handful of teams in the Eastern Conference improving their rosters during the offseason, every point, even this early in the season, is critical.
The Original Six clubs will get together in the first game of a NBCSN Wednesday Night Rivalry doubleheader at Air Canada Centre (8 p.m. ET), when the Bruins will be seeking their sixth straight win. The Maple Leafs, meanwhile, will try to make it three in a row.
On the other side of North America, the Los Angeles Kings will head down the freeway to take on the Anaheim Ducks at Honda Center (10:30 p.m. ET) in the first game between the teams since the Western Conference Second Round of the 2014 Stanley Cup Playoffs, which the Kings won in seven games.
Anaheim has lost its past three games, but it enters Wednesday with a five-game point streak (2-0-3). Los Angeles is on a three-game point streak (2-0-1).
Here are five things to watch in the Wednesday Night Rivalry games: