Can you do that mixed ticketing without sending your fare up into the stratosphere? Most carrier's reduced fares are limited to their own services or codeshares.
Both LH and AC will be 340's, so there is nothing to choose in terms of equipment.
Don't forget to bring your woolies. Although today is brilliantly (nay, even blindingly) sunny, November in Vancouver is the start of the gray and wet season.
(At least we don't have to shovel the rain, though!).