okay heres some quick measurements (in mm)
syncros / fsa
starting width 7.60 / 7.75
ending width 8.90 / 8.95
hypotenuse length 16.30 / 15.65

on the FSA, the taper does not begin and the very end of the spindle, its a bit rounded on the end. i measured from where the taper begins, which is apparent, not the very end of the BB. on the syncros, the very end of the spindle is the start of the taper. easy to see which is better...

that should be enough data to find the angles...