The YEG - YYC comparison can be misleading
The YEG - YYC comparison can be misleading as WS does the route in 100% jet aircraft, AC is mostly those older, slower, and generally crappy flight DASH8 turbo props. Eliminate the DASH8 flights, and just compare WS jet flights YEG - YYC to AC Jet flights and you may find that there is indeed a lower price advantage to WS for that route.