From the Super Mario Wiki
New Super Mario Bros. Wii
The Coin Courses in New Super Mario Bros. Wii is a multiplayer-exclusive world found in the Coin Battle mode. It includes only five stages (found in the Recommended Courses tab on the level select menu) available alongside the rest of the levels in the game, with each level containing large amounts of coins for players to collect. There are no Checkpoint Flags found in any of the levels.
New Super Mario Bros. U
The Coin Courses in New Super Mario Bros. U, is a multiplayer-exclusive world found in the Coin Battle. It contains eight courses that are not founded in the original game. A new feature from New Super Mario Bros. Wii is the Coin Edit, where a player uses the Wii U GamePad to place up to 300 Coins and the 3 Star Coins.
Another name for Coin Courses is World-Coin.
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