Legsweep is mildly more efficient, and in a situation where someone has spammed themselves out, its downright deadly.

Trip lag itself is identical to legsweep.
A landed trip is 1.9 for them and 2.0 for you
So they will ALWAYS get exactly 1 command in which your goal is to make that one command
directional.
A missed trip is 1.5? 1.6? for you and obviously 0 for them, this decimal lag means that you can miss 1 trip and only take one round of combat before you can land another.
However if you do something like gutshot which is 2 rounds your missed trip could possibly take you 2 rounds to recover from due to the way the mud rounds commands not to mention the additional varience in ping.