There have been way more late game close finishes and comebacks in the NFL over the past two years than the CFL and it's not even close. Of course having 4x the number of teams influences that but week in and week out it seems that other than three or four duds, every game is entertaining and competitive. Compared to the borefest offensive ineptitude in the CFL, I'm thankful that there's some high level quality ball to watch again with it and the college season having kicked off.
I tried watching some of the Riders Hamilton game on Sunday while flipping from the NFL during commercial breaks and it's amazing the discrepancy between the two leagues in terms of even the basic fundamentals. Much less error prone players in the NFL whereas in the CFL you see simple mistakes, whether it be dropped balls, blown coverages, missed blocking assignments than you ever see in any one NFL game.