The cherry flavor in Kirsch is very different from the flavor of cherry schnapps or puckers; which are known for their syrupy sweetness. Kirsch, on the other hand, has a clean, subtle cherry aroma, in which the fruitiness is maintained, and is not overpowering or artificial. This is one of the reasons why it is used as a kitchen liqueur and is also favored as a drink.
It is used to bake Black Forest cakes as well as in fondue. Many a time, it is seen that people confuse kirsch with creme de kirsch, which is actually a sweet cherry liqueur.
Use vodka or schnapps. If you have access to cherry vodka, it can be an option as well. There are also cherry liqueurs, which are available. But most of them are sweeter than kirsch, which means that you need to modify the sugar content in the recipe.