As we’ve seen, and as you probably expected, both formats have their inherent strengths and weaknesses. When it comes to which format is suitable for you, there’s not much to it. Here’s the rule of them:
Do you currently use or do you plan on using Pro Tools? If the answer is yes, you are stuck with AAX.
If you use pretty much any DAW (aside from Logic), you can use VST plugins.
VST plugins are more widely supported than AAX plugins, but AAX plugins have some performance benefits, especially if you’re using DSP hardware to handle your processing.