Looking into a new bike for the spring and as much as I want to support an LBS, the pricing is just so out of line even after international shipping. I’ve never had a proper fitting (or a proper fit bike as it turns out) so I am going a bit by spec. For most frames I am right on the edge of fitting into the high end of a 54 or low end of a 56. My preference is to go with a 54 and have a slightly shorter reach than stretch out into a 56 or have a really short stem. Anyway, looking at stack/reach numbers of various bikes, they all seems to come in very close. Of four possibilities, would the 4 bikes be similar in fit or does the 5-10mm make a huge difference?