Observing Neil Cole and Ed Young Jr. is a study in contrasts. The soft-spoken Cole quietly entered the vacant sanctuary where we were meeting. He lingered in the back for a while before anyone realized he had arrived. By contrast, Young burst into the room with a shout—every head turned. The sanctuary was immediately electrified.

Their contrasting personalities are paired with very different approaches to ministry. Ed Young Jr. is senior pastor of Fellowship Church, a seeker-driven congregation that began in Dallas in 1990. After surpassing 20,000 in weekly attendance, Fellowship Church is still growing with a highly structured multi-site model that uses video broadcasts of Young's sermons. The megachurch now has four locations in the Dallas/Fort Worth area and recently launched its fifth campus in Miami, Florida.

Neil Cole is a pastor and the director of Church Multiplication Associates (CMA), a "growing family of organic church networks." Cole advocates a decentralized, micro-church ...