Hi David,
First of all, congrats on your upcoming knot tying, many best wishes.
May I suggest that you post your question also on the Air Canada forum, as many of the people there have flown on both airlines, and could probably give you a good insight into longer term comparisons.
Best of luck.
bj-21.
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'Tis better to have played and won, then never to have played at all.
Jeff