There are a few subtle, important differences... Check out the original paper and they should become apparent: http://web.cecs.pdx.edu/~black/publications/TR_

There are a few subtle, important differences... Check out the original paper and they should become apparent: http://web.cecs.pdx.edu/~black/publications/TR_CSE_02-013.pdf http://web.cecs.pdx.edu/~black/publications/TR_CSE_02-013.pd...