I could provide some help, if you can post your overall height and an actual saddle height. I don't like using cycling inseam because it so often gets measured wrong and saddle height can easily vary by 2-3cm, even among riders who claim to have the same cycling.

If yu look at the geometry charts, there is little difference in the two smallest sizes that have very short head tubes. The 52cm size finally gets a head tube length increase from 103mm to 125mm.