This one is a little bit different though. I don't think anyone besides the devs can say for sure if you can get a different reward than last year (each IS a different quest after all), or if completing any of them means you'll only get an SP at the end.I'm guessing so, quests usually repeat each year.
For the most part, but the difference is most important to me for my quester. I hate to waste advent goodies just hoping that the old quests (which counts as a quest) are available, when they may not and all three quests will only be repeatable quests (which don't count as quests). Then there's w9, which I started in December. I'd sold all my marbles and didn't bother replacing them, so I actually still have last year's finished advent calendar.SP is good enough for me