Spore formation is a method of asexual reproduction which is found in non flowering plants such as fungi (Rhizopus) and bacteria. In this method of reproduction, the parent plant produces hundreds of tiny spores which can grow into new plants. The spores are the microscopic, tough and resistant bodies which are round in shape and can grow into a new plant under suitable conditions.
Asexual reproduction results in a clone of the parent, meaning the offspring has identical DNA as the parent. There is usually no variation from generation to generation in a species population that relies on asexual reproduction.
So the answer is,there is no variation in spore formation.