I've flown the Air Canada and/or Lufthansa combination quite frequently to Germany. (They are "partnered" Star Alliance airlines.). In terms of comfort, it really depends on the specific plane you get more than the airline, at least between Air Canada and Lufthansa. Lufthansa's fleet is generally newer and more comfortable, but Air Canada did some upgrades on the cabins in their older planes in 2008.
As for vegan food . . . to be honest, I'd say it's pretty bad. It's more a diversion on a long flight than something enjoyable or filling. One benefit is that "special request" meals are served before everyone else. The vegetarian non-dairy option generally has NO protein. (Apparently food services think the only vegetarian protein option is cheese!) I always pack some Larabars (or equivalent) and/or some nuts as a protein source for the flight and the first few hours on the ground (until I find my local vegan source . . .).
One improvement you will probably notice if you haven't flown for 8 years is in-flight entertainment. I think all Lufthansa and Air Canada overseas flights now have seat-back monitors and a large selection of movies, TV shows, etc. (so that each passenger can watch what they want, pause the player, etc.) Only the newest planes have power outlets and/or USB chargers. (I had these on maybe 1 of 4 of my last transatlantic flights.)
Have a great trip . . . though if the weather continues, it may be colder there than here!
figured since i'll be flying for the first time in about 8 years, and first time since vegan, wondering what everyone's favorite airlines are. what vegan dish did you get? were seats comfortable? power outlets? etc... the usual.
I thought we'd be going Air Canada to Germany than Lufthansa to Poland, but apparently it's Lufthansa all around
i'm so uber excited about the trip, but i really can't wait for the flight to see what vegan food i get haha