Zenedit will help you with the sensitivity of each trigger. You can adjust settings per trigger and you can make changes based on how you play. If you notice that one trigger is not responding like another, you can change the non responsive trigger with Zenedit and make it "hotter" it will trigger with a lighter touch. As for software versus drum modules, the module has limited variations for each drum, there may only be 4 soft, 4 medium, and 4 hard hits for each drum, with software, you can load in 20 soft, medium and hard hits if the software is that extensive. The new Zendrum Drive has tons of hits per velocity. David said he recorded from the softest hit to breaking the stick on each drum. With that you will have the maximum amount of response to your trigger hits. I am using SD2 and it has the same concept, but I think the Zendrum Drive has more samples to choose from in regards to velocity. BFD2 is the same way, I don't have BFD2 (yet) but I know it takes a lot of computer memory so I can imagine there are many velocity samples to choose from.