An overmatched cornerback will be found out under the bright lights of a wide receiver taking a DB wider and longer than he can on a NFL sized field. Special Teams also have a larger role than the NFL as the wider, longer field provides more real estate for a talented return man to maneuver. Media coverage of the CFL in US publications is minimal and injury updates are even more difficult for one to find and then translate and manipulate. Injuries, and their importance, are accentuated when an injury occurs to a Canadian. Knowing when these situations occur and the affect they have on the entire roster is imperative.
History is history, remember that.
How a team plays today is irrespective of how the team before them played or even how these same teams played previously, conditions are never identical. A football is not round and doesn't bounce true, and bounces can certainly alter the outcome of a wager. Current Form is a much more important factor. Trends work for some other sports such as baseball but only because these are current trends and relate to current form and are feasible due to the number of games played every day. Even then a trend would never be the sole influence behind a wager.