As Bamacheese said in post #2, the bats' diets are very stable, that is to say that they go through life eating the same things.
Mexican Bat Guano comes, primarily, from the Mexican Freetail Bat; which lives on an eclusive diet of insects. As a result thier guano is very high in Nitrogen and very low in Phosphorous and Potassium, this ratio makes for a great nutrient to use for Vegging.
Indonesian and Jamaican Bat Guanos, on the other hand, are the results of diets that consist only of fruits. The result is guano that is high in Phosphorous and low in both Nitrogen and Potassium, making them the right choice to use as a Flowering nutrient.
You've heard the saying "You are what you eat"? Well, when it comes to Bat Guano, that is exactly what they're talking about!