most people that apply to night school have no choice because they have to make money to support their family. It is easier to get into based on stats, as you look on the LSAC ABA stats that just came out, you will see that less people apply to PT programs and their stats are definitely lower.
i think you will get the same education but it's going to take a lot of hard work since you have to juggle a 40+ work week and law school, plus it's going to take longer time.
that said, if you want to go to law school, feed your kids at the same time, and that's all you can do, what else are you going to do?