Every Labor is Different
In a perfect world I would tell you that your second labor will be quicker and easier than you first but unfortunately that is not always the case. There is really no way to predict how long your labor will be.
Generally second or third labors will be shorter than the first labor because the body already delivered a baby before and already knows what to do. There are so many factor involved in labor, factors that are constantly changing. The position of your baby has a lot to do with the length of labor.