Are dconf schema names case-sensitive?

Dconf schema tree is tricky and not always relevant to actual schema names.

For example, under apps you can find update-manager, but you will not find apps.update-manager schema using gsettings. Valid schema name is com.ubuntu.update-manager, and it isn't shown in Dconf where it actually should be. Correct schema name in Dconf can be found below the keys list, at the grey field with Description and Default value. (See screenshot) Topmost entry shows real Schema name.

So I'd trust gsettings output. In your case com.canonical.Unity.Launcher is the valid schema name and its case really matters.