“Vedic Meditation” and other similar practices — how is TM different?

Recognizing the effectiveness of the Transcendental Meditation technique and Maharishi Mahesh Yogi's success as a teacher, some people teaching meditation have modeled their course of instruction after the TM Course. These meditation teachers typically use Maharishi's terminology and principles, follow many of his steps of instruction, and often claim to be teaching the same technique—but usually