Watch a game on TSN then watch on Sunday, and decide for yourself. Some people are CFL fans, some are NFL only fans, and some love both.
It's different. I have to say I never liked 3 down football. What really has ruined it for me is that CFL receivers are allowed basically a running head start, as long as they don't get past the line of scrimmage. 4 down football has more balance, and I like the battles for the d and o lines. Also don't buy into the excuses "Well the NFL has way more cameras, and coverage on TV..." I look at the game itself. I have nothing but respect for CFL players. They are some of the hardest working players in sports and get paid peanuts.
But both aren't as entertaining as rugby.