Bob, I wonder what you think about the color difference.
I respect the reviews of Ed Ting's. I have read all his reviews. To me these are personal observations. Even at our local club, everyone has their own opinion from their experience.
Each eye is different, to me the sample of the FS-102NSV that I have is color free, though with a little yellow tint as mentioned. The FC-100D is almost color free. The FC-100DL was color free as it gets. After comparing the TSA-102 vs FS-102 and FC-100D vs TSA-120. I'm very happy with the performance of the FS-102 and FC-100D. Between the FS-102 and FC-100D, to me the FS-102NSV is a better scope, it can take higher magnification.
Single scope observing reports can be problematic because of conditions and the lack of any comparisons, etc. Side-by-side comparisons are less problematic. Side-by-side comparisons with multiple observes are even better. The Ting review of the Tak FS 152 vs the AP 155 and the Tak 102 vs the Traveler did have multiple observers.
Don’t get me wrong, these are all really really great scopes. And as Daniel said, color is just part of the story. For visual, there are other factors that can be "much more important" than color. But if all those other factors are the same or are eliminated and ONLY the color difference remains, that can/might make a difference.
Being happy with a scope is also a great thing but that says little about absolute performance. And, of course, sample variation can also play a part.
But “if executed to the same equally high standards,” the color crossing charts between a TSA 102 and an FS 102 will tell “part” of the story, again if all other factors are the same.
I have not observed with the new 100 series but have observed many times with an FS 102 and FS 128. I have owned a TSA 120 and a Mewlon 210 for many years. I also owned an AP 155 F 7 and 152mm F9 refractor for many years, along with TV, a Vixen Fluorite refractor, and a refractor with a great LZOS 105mm triplet lens and a couple of achromats as well.
Visually they were/are all pretty great.