Empress is correct in his explanation, while the others add further "colour" to describe the enhancement of services and actual layout of the aircraft utilized. AC's domestic and transborder front cabin service is called Executive Class. The seat, except for being larger and having more pitch than the economy [Hospitality Class] seat, is quite different from the Executive First product. Menu is enchanced and drinks are free, but other perks -- amenity kits, lounge access, etc. -- are not provided. Intercontinental offers multi-channel video with TVs rising from armrests [or individual videoplayback units on CP].

The front cabin on international, or intercontinental, flights is called Executive First (except on some routes to LHR from the Atlantic provinces where traffic volumes don't generate enough money to provide the real Executive First service, and domestic version 767 aircraft can be used). Beyond the seats, the food service is multi-course, wine selection enhanced, and items like amenity kits as welll as MLL and Arrivals Lounge (at LHR and YVR] access are included in the product.

As described, AC's fleet consists of 4 types of widebodies capable of trans-oceanic [intercontinental] travel. 747, 330 and 340 aircraft are configured exclusively in the intercontinental version of front cabin: 55-inch plus pitch, larger seats, etc. The 767 fleet, however, is mixed with both 200 and 300 models, most configured to intercontinental service standards, others to domestic/transborder. The domestic/ transborder seating is a standard J or F domestic seat and pitch, or "squished" as Max Power has said.

CP fleet includes all intercontinental standard seating on 747s and a similar mix in the 767 fleet as found on AC. It's intercontinental service was called alternately Empress Class or Business Class, while the domestic/transborder used Business Class. Deatils of inflight services are similar to those on AC. Domestic product has seats which feature leg rests which extend out from the seat, unlike AC's seats which do not have this feature, only leg rests attached to seat in front.

For fleet deployment and efficient aircraft utilization purposes, select intercontinental configured 767s (and all of the other widebody aircraft mentioned) may be found from time to time on select high-density/high-traffic domestic or transborder routes, though this does not indicate a service enhancement since there is little in cabin service difference from normal domestic. There is no such thing as Executive First on these routes, only the seating will be different from standard Executive class. If you end up on one of these flights, in the front cabin, enjoy the major difference: space -- the final frontier.