Note: this was supposed to be an edit to the above, not a new post, but the time limit on editing is rather draconian, it seems.
Notable at unboxing:
*Tip assembly has the black SOTOR coating, which my regular SOTAR does not.
*Box is much smaller than that of the regular SOTAR, and the butt of the needle contacts the upper right corner: must check nozzle for damage from impacts to the needle during transit.
*Ambidextrous cup hole cap fits well, but there is what appears to be rust (odd, since the parts are brass) trapped between the cap and body. Will have to polish that carefully to avoid effecting fit.
*Parts appear to be cleaner than on my regular SOTAR: shinier finish, crisper edges.
*Color cup does noticeably effect the balance. It's a very light brush to begin with, and the color cup is a nice chunk of metal with a relatively long moment arm. I intend to modify plastic Aztek cups to fit, which if doable should fix this.
For those who are curious, "Wonderfest Edition" means this was originally intended to be sold at Wonderfest, which is a major Sci-Fi/Fantasy modeling convention held annually in both the US and Japan. Dunno if it was just the debut sale venue, or if it was originally supposed to be a con exclusive, or what.
Give me a couple days to filddle with it, and I'll post some more in-depth info.