From a strictly workout standpoint (not dealing with diet and stuff) which would one think to be better? Three days a week is working out better for my schedule, but I could switch back to four if necessary
If the three days a week routine is more convenient for you (ie causes you to miss fewer workouts, and doesn't disrupt your life outside the gym as much), it is better
BTW, it was pointed out in another thread
that deadlift variations really work the lower back. Your workout will hit the lower back three times a week. You might have to play with poundages and intensities to keep from overtraining the lower back.