Congratulations, Luciano! I'm happy to hear your bike finally arrived and you did not have to settle for a bike you did not want. I'm also glad to hear you were able to try both frame sizes side-by-side. I also tried 56 and 58 frame sizes at my LBS before buying my Diverge, and the 58 was just to big a stretch and put my weight too far rearward. I have the same 30/32 spec tires on my Diverge, and they are huge and feel very floaty. I'm also looking at downsizing to 28's, as the gravel and single track I ride on are packed pretty good - not much loose stuff. Have fun, and keep us up to date with your impressions.
lsberrios1, as I wrote earlier, I'm a 56 size. I'm in no hurry at the moment, as I am struggling to figure out how to mount aero bars to the new spec hoverbar on the Roubaix. I'll probably have to replace the drop bars with aftermarket bars with a straight section near the stem.