I never dreamed of there being a sequel to Super Mario Galaxy when I saw the trailer on December 2007, but that's not the point of this post. The point is recalling which of the missions (with the names and stars) are unique in both games separately.
In Super Mario Galaxy 1, all major galaxies have three distinct missions, though some aren't always unique. All the major galaxies have 3 unique missions that have unexplored or new areas. These 15 (yeah, count them. same number as the number of Courses in Mario 64) with about 3 unique missions each make 43 unique missions (I count the Sea Slide as only 1). Each small (1 or 2 stars) galaxy counts as 1 unique mission, making 26 unique missions. Now I'll count some secret stars as halved unique missions. These secret areas are in the Battlerock, Space Junk, Beach Bowl, Ghostly, Freezeflame, Dusty Dune (2 in this one, 1 in the others), Toy Time, Sea Slide, Melty Molten, and Deep Dark galaxies.
Adding them up, 43 + 26 + 6 = 75. The other missions are all just doing the same thing again.
In Super Mario Galaxy 2, all galaxies have one or two absolutely unique missions. Galaxies with one are 4 in World 1, 6 in World 2, 4 in World 3, 4 in World 4, 4 in World 5, 6 in World 6, and 4 in World S (I'm never counting Super Mario Galaxy ripoffs). That makes 32. Then the galaxies with two absolutely unique missions add up to 20 unique missions. I'll count the secret stars in these galaxies as halved unique missions: Fluffy Bluff, Rightside Down, Puzzle Plank, Hightail Falls, Cosmic Cove, Cloudy Court, Freezy Flake, Bowser Jr.'s Boom Bunker (for a dark matter area in the daredevil run), Clockwork Ruins, and Battle Belt galaxies.
Adding them up, 32 + 20 + 5 = 57. That's not as good as Super Mario Galaxy 1, and 57 is not even half of the 122 non-green stars.
