It's interesting you mention the FC was not as well colour corrected as the Vixen. I made a similar side by side comparison back in April 2015, and after a night of observing the Moon and Jupiter, the three of us who were observing could only say the FC100DC seemed slightly warmer. There was no discernible colour fringing to the lunar limb and the detail in Jupiter's belts and zones was equal in detail. The DC's slightly warmer tone seemed to work to advantage on Jupiter, as it gave a real vibrance to the belts, almost making them stand out in 3D.
The Vixen was exquisit and as visually perfect as it gets. The shorter Tak kept pace in every way, leaving us all almost speechless. All we could really say by the end of the evening was that either scope would keep us happy for the rest of our lives. Two of us felt the FC100DC had the advantage in that it was easier to use, being significantly shorter physically. To this day the FC100DC has never even hinted at CA around the lunar limb, and has wowed many with its stunning high power views well in excess of 400X. We used XW eyepieces during the comparison in Cyclops mode. While in binoviewer mode we used orthoscopics.
Edited by mikeDnight, 16 February 2020 - 12:57 PM.