In GG, all three tech-directions are the same "speed". The only difference is when they occur. The neutral-tech point happens after the front/back-tech points.
In MB, shrug. I think the amount of recovery from the different ground-techs are all the same. The only thing diffrent is how much bouncing you do, which changes when the recover happens (and of course, where you are). Neutral-ground-tech, you just bounce in place, and start recovering. The two side techs, you have to bounce all the way over, then start your recovery. And that gives them more time to set something up, but the trade off is that you may not be where they expect you to be. /shrug