I say cider. I have done both, and while the clear juice adheres to Ed Wort's apfelwein recipe, there is nothing like aged cider done right. It is the tastiest stuff, ever. Yeah apfelwein is good, but if you desire more body and flavor, go cider. Just don't expect a clear product like when you use juice, it won't clear for a long time, if ever.
Whatever you do though, aging is key. 3-5 months either one is drinkable, 6+ is excellent.