Shimano's Ultegra Di2 series with electronic shifting is "pro-proven" as it is a direct trickle down from the Dura Ace group. It stands for state-of-the-art technology, proven in pro races, the technologies used in the new Ultegra 6870 series 11 speed, newly designed brakes, new chain treatment etc. The electronic shifting lets you concentrate on your performance - not your bike.
The Dura-Ace 9000 series is Shimano's lightest, most ergonomic, and most precise groupset ever. As well as delivering the finest mechanical performance, it also serves as the core chasis for Shimano's revolutionary Di2 digital shifting system. The extra eleventh gear and numerous other enhancements combine to deliver a truly dominating performance. When you ride Dura-Ace, you're riding to win.
The XTR M9000 series is composed of the most advanced XTR mountain bike components and wheels to date. With this totally new XTR line available in both Race and Trail "Rider-Tuned" product families, Shimano leverages its 22 years of engineering leadership to produce the industry's highest performing mountain bike component group.