TM meditation and Integral mindfulness

I am a longtime meditator, I have never taken the TM course. I do understand certain principles of the approach, It seems to be vastly different " Transcending Thought" does anyone know, is this practiced directed to settling into the casual body, My question to the community is what is the difference between TM and Mindfulness meditation? particularly integral mindfullness where we witness the stages of development to make them objective to our awareness. Can TM be integrated into this process? Just some thoughts about No thought?
Thanks to all