I'd probably side with Pitou until Ging actually shows some feats. His Nen abilities seem purely power oriented, which based on scaling, should place him below Pitou in both Nen power and combat ability. Then again, Pitou found Kite to be a fairly challenging opponent, so either way, a fight between Ging and Pitou ought to be fairly even. I'd assume based on Dark Continent hype, Ging ought to have abilities that are at least Royal Guard level to combat the threats there, though that's just speculation for now.