AvangiThe city is noisy but the outskirts are lonely.
Agreed, I should have thought of that.
AvangiThe city is noisy but the village is quieter / more quiet.
I don't think you will hear many native speakers saying "more quiet" in this context or in any context for that matter.
Although, sadly, I have been hearing far too many people using the "more X" construction where it's not really appropriate (instead of "Xer"). I would appreciate any comments on this from the grammar experts out there.