I provided a small analysis further up why every MK Sig has to look a little pink. Essentially Fender Hot Rod Red is like Corsa Red (pure red with a certain intensity) but with a little additional shot of blue. As soon as the color reflects light being on the cooler side of the spectrum (e.g. LED), you will get the pink effect.
Fiesta Red has a bit of green and blue to it, so sometimes it looks pink, sometimes salmon, most often just orange-red. It all depends on the light. This is why it's impossible to photograph these guitars or you should take multiple pictures in varying lighting conditions.