Not sure if you are aware, but with the Ouidad cut they don't cut length- per se. You hair will not be/or appear shorter after the cut. With the carve and slice they cut select pieces internally so that your curls will form better/have more definition and lay better (you hair will not stack out from your head, but hang) no matter the length.
I have always gotten more length showing after a Ouidad cut. Also after the cut product applies better and more evenly and my hair tangles less.