your arm length matters just as much as your shoulder position and your torso length as well as the size of your frame.

fit isn't an exact science without all the measurements and even if it was you didn't give us the ones we'd need to make the data you did provide relevant.

get two stems, and try them each out. or get fitted at a bike shop that has a fit bike, or at least demo fit stems.

i think we should initiate a policy- no answers to fit questions.

'it doesn't matter' is also not an answer... there will be a difference though it will probably just be the angle your butt's on the saddle and the angle your backbone bends.