I see the value in both of these tools/methods. At the end of the day, I think although each one is sort of designed for the same thing, where they are best suited is dependent on the type of group using each one.
In some ways, I think the Zume approach might be a better tool to leave someone with if you have a very short time to disciple them and they are eager to lead something. It is more user-friendly and forgiving, and sometimes it’s just nicer to give people a tangible “app” to look through.
DBS is good in the sense of versatility. Its value is completely weighted on the answers to the questions and the conversations that persist. But, as far as leading it I think DBS requires more discernment as to how to draw value out of the situation. But then for that exact reason, I think I like DBS more because it’s more personal and human. Sometimes when you whip out fancy apps it discourages people, so again that’s up to the context you’re working in.
In short, Zume is a better “tool” with a smaller threshold for life-giving discussion. DBS is a more versatile approach that can more effectively create a vulnerable environment because it’s personable.