Calgary should win....but Calgary should have won last year. And in 2012.
I think the key to the game is Claybrooks' scheming against Ricky Ray. Blitzing is, and always has been, his kryptonite. For some reason, Don Matthews was the only coach that seemed to realize this and bring 7-man rushes over and over. I think Calgary has a smart enough coaching staff to bring pressure consistently. Toronto will need to counter that with screens and dump offs to James Wilder. I expect defensive MOP Alex Singleton to spy Wilder in those situations, and that's going to be the biggest one-on-one matchup. Toronto has their work cut out for them. They couldn't move the ball at all against Saskatchewan last week, needing a pick-6 to win. Calgary's defense isn't typically as aggressive as Sask's though, which is a benefit to the Argos.
Toronto's defense has been quietly solid for most of the season. I think in their minds, they know the likely need to hold Calgary's offense to 25 points or less and force a couple turnovers to have a serious chance of winning. Not a small task, but Bo-Levi Mitchell has tended to wilt in Grey Cup games. 3 picks last year to put the Stampeders on the wrong end of one of the biggest upsets in history. Had trouble moving the ball against a mediocre Hamilton defense as the Stamps were a holding penalty away from losing in 2014 as well. Will he finally come through with a great performance? Possibly, but I'll believe it when I see it.
Prediction: Calgary chokes again. 26-25 Argonauts. The Argos don't hold a victory parade, citing lack of fan interest.