The game is basically a tossup and may well be determined by puck luck.
Obviously, the team with the goalie who plays best is most likely to win. However, looking at the performance of the goaltenders over a period of time, not just the tournament games, there is no actual way of predicting which of Hart or Parsons is likely to be hot today. It could be either. Right now, I would trust Woll over Ingram, but I think both will be confined to opening and closing the gate at the end of the bench. I am sure both of them can carry out their duties.
In theory, home ice should be an advantage to Canada but that may not be the case in World Juniors as much as it is in the NHL. Does anyone know the history of the results when the host team is playing in the gold medal game?
A matter which may be closely related to home ice is that Canada came out flat at the beginning of the round robin game. I do not think this was because they were not up for the game. Just the opposite, IMO. I think they were so up for the game that they came out tight. If this happens again, the US will very likely win.
Both teams are packed with high draft choices, Canada somewhat more so. But this doesn't mean much at this stage of the players' careers. The draft choices are made on the basis of future upside in the NHL, not present performance in junior hockey. In any case, the Americans may have an advantage in team play because so many of them played together at some point in USNDTP and are familiar with a common system. Team play trumps individual skill.
I think the American forwards have been playing better than Canada's, at least until the Canada-Sweden game. Keller, Greenway and White have often verged on the dominant. (I know they are not a line. I'm saying that they have been the best US forwards, IMO.). Particularly without Myers, the Canadian blueline will have trouble containing the massive Greenway whose prospect stock is rising like a bullet. However, I think Chabot has clearly been the best blueliner in the tournament and the US blueline does have some size challenged Dmen who could be a bit exposed if the Canadian forwards forecheck like they did against Sweden.
As everyone has been noting, it is hard to beat a good team twice in a tournament. That doesn't mean it is impossible, cf US-Russia. Like that game, it may come to OT and then to a shootout.
My heart says Canada, of course, but my head says, "Who knows?"