I can choose between 2 quill stems, as I have to replace the one on my old Marin - converted for cyclotourism. My bike:



Negative stem:


Positive stem:



Is there a particular reason to put on another positive stem? As I prefer the look of the negative one, but I admit I see vintage MTBs only coming with positive stems. Is there a steering control advantage that might favor positive stems? Keep in mind i'm only going on tarmac and white roads with this bike.