101 Ultra HD is a modern, fast acting, paint leveling compound. 101 Ultra HD is VOC compliant and body shop safe, containing no waxes or silicones. It is a one step product, finishing with a nice polish. The difference between Turbo Cut 1000 and 101 Ultra HD is the size of the abrasives. The abrasives in TC1000 are much bigger than 101 Ultra HD, leaving the end user to cut much faster. The breakdown is the same because where Ultra HD lacks the size, the amount of actual abrasives in the compound is much higher, allowing a longer buffing 'finesse' time.