So I'm a little overwhelmed here. We've narrowed it down to two diaper services: One offers fitted diapers (we'd still be putting a shell over it to prevent leaks/dampness through to clothes), and the other offers pre-folds. So in either case, we'll be using the protective covers/shells over top.

What's the benefit of the pre-fold vs the fitted? Any advice? The pre-fold diaper service is cheaper, but to me, wouldn't the fitted be easier/more convenient? I'm confused! Help!