One of the significant departures from the earlier volume is the focus( or lack of it) on benchmarking. While the authors almost created the 'benchmarking industry' with that book, they no longer appear to be so fascinated by the concept.
They say- let us forget what others are doing- let us see how far can we go on our own understanding and analysis. Sounds remarkably similar to the motivational concpets of self actualization. They feel that this is the way to remove muda. After all, the entire benchmarking industry could not have produced the 10X jumps brought by Toyota Motors in the 1950-60s. So their ideas are acceptable.
Over all, the book represents an evolution of the thought and research done by these two manufacturing specialists.
Certainly a good reading. More than the price