I'm buying a new frame and fork, and I want to end up with a fit on the new bike that matches the fit of another bike I own. I wrote a program to calculate the fit (yes, I am a geek) in terms of saddle position, stem length, etc., but I can get the same approximate handlebar position with multiple combinations of headset spacers and stem length and angle.
So here's my question: is there any reason, aside from aesthetics, to choose a relatively high stem position with a small angle over a lower stem position with a steeper offset?
That is, is there a reason to choose something like this:
over something like this:
or vice versa?