Thank you! Are those reach numbers reversed? How could the reach be shorter on the 59?
I suspected you would ask that. The answer is no. It’s pretty typical to see this on bikes that weren’t designed with stack and reach in mind.
If you look at the chart I just posted above for Luiz you’ll note that the STA changes by 1 degree from 57 to 59, which negates the 1cm change in top tube. Then the longer head tube reduces reach further.
They are actually the same length. If we normalise the bar height (since you don’t ride a frame only) the reach to the bars is only 1mm different. Having identical front centre figures backs up that they are the same length.
Basically you would choose the 59 if you needed higher bars and the 57 if you needed lower. The 57 requires 17mm more spacers to get the same bar height with the same stem.