I have a choice between flying CO Nonstop in BF from NRT to EWR or NRT-YYZ-EWR on AC 777-300ER in business. I don't care as much about layovers as much as having a better business class experience. Does anyone know, what are some of the benefits and drawbacks when comparing CO BF NRT-EWR service vs. AC Business (I guess on this particular aircraft on Air Canada it is called Executive First)?