That's my site xD
She's a genuine variant release. The Glowing Magic/GnS ponies have a lot of variations, though. I don't know that there are many coral haired ones in the community. I've had mine years, and I know that Noasar also has one because she posted about getting it a few years back.
Dazzleglow, Happyglow and Brightglow also have hair variations of some variety. For some reason a lot of ponies from this release year have variations in the hair, especially between Europe and the US release.
So yeah. Legit variant.