The two rivals came into this with two wins from two, though the moods in the respective camps were contrasting after Sweden had beaten Slovakia 5-0 and Austria 4-2, whereas Finland laboured to a 2-1 win over the Austrians before coming close to suffering a shock defeat to France.
The Finns left it very late before fighting back against Les Bleus in the final minutes, eventually getting a 4-3 overtime win, and they would have to come from behind again after an early concession tonight.
Sweden began the match the stronger, and when Atro Leppanen was called for hooking in the fifth minute, it wasn't long before Erik Gustafsson took aim from range. His shot was saved, but the rebound fell kindly for Leo Carlsson, who tapped in the opener.
The Finnish response was poor - an Ahti Oksanen strike from in front of the net midway through the period was one of only two shots on goal they could muster in the first 20 minutes.
One crumb of comfort for Finland was they survived a further four minutes a man down, after Waltteri Merela caught Lucas Raymond in the face with his stick. Mika Zibanejad, Marcus Johansson and Filip Forsberg were among those to try their luck late on, but 1-0 was how it stayed after 20 minutes.
Antti Pennanen's side came out in the second period was more attacking intent, but despite Teuvo Teravainen regularly testing Jacob Markstrom, Finland could not force an equaliser.
With seven minutes gone in the second, the Leijonat were made to pay - Raymond broke out of his defensive zone and into Finland territory down the left side, before playing a perfectly-weighted pass across to Jonas Brodin, which the Minnesota Wild man fired in off the upright for his third goal of the championship from just six shots on goal.
Once again, Finland were on the back foot having conceded, but again Sweden could not turn their momentum into further goals.
Finnish fans were on their feet six minutes into the third after constant pressure from their side resulted in Leni Hameenaho striking the puck past Markstrom, but off the pipes and out.
The blue and white pockets of the arena did finally have something to celebrate with six minutes to play, when a Mikko Lehtonen strike caused chaos in front of the Swedish goal, before the puck was forced into the net by Harri Pesonen.
Finland went for broke late on by taking out their goaltender, however a second two-goal comeback in as many days was beyond them, as the Swedish defence closed out the narrow victory.
Sweden move onto nine points, three clear of Canada, who have a game in hand, while Finland remain in third place on five points.
Sweden will be back in action on Wednesday against Latvia, while Finland have an extra day's rest before taking on Slovenia.