What is a difference between Gagne's theory and Bloom's Taxonomy?

It’s easy to get caught up in theories without really looking at whether the research support is there. Gagne’s Nine Events of Instruction might be helpful as a designer, but they aren’t really supported; you can skip everything but practice with feedback without much change in results. Learning styles (like visual, auditory, kinesthetic) have much less effect on learning results than other factors, but we often focus on them heavily. Bloom didn’t have any research for his taxonomy, but I still find it useful for my own planning; I just don’t pretend there’s a research-based argument for classifying a verb as application instead of analysis.