I don't know for sure, but I would assume the same amount of time for either, so about a week or 2.
When I keg my beers, I put them in the fridge and on 30psi for 2 or 3 days then turn it down to about 10psi to finish. The 30psi for 2 or 3 days ramps the carbonation up quicker, but then I turn...