I always liked to start the orals up front to get the cycle going. By the time you are done with the orals, your injects are kicked in 100% and you have a smooth transition.
I've honestly never liked back loading, i always thought it was a waste of gear since you're about to come off. It takes time to build real muscle and using orals at the end before PCT just seems like a waste. I would think the kick start with orals would give you a better chance at adding a few extra pounds of muscle throughout the entire cycle.