to me, it is never a matter of if a player who stars in one league is better than a player who stars in the other league. IMO, the best players star in one league and at least do well in the other.
That is one reason by I believe that Fernandez was the best receiver to play in the CFL in the past 50 years. Quite simply, he excelled in cfl and did well in NFL. To me, that makes him better than every CFL receiver who couldn't cut it in the NFL.
There must be others that I am forgetting, but the only other CFL star receiver that I can remember having at least moderate career in NFL is Terry Greer.