It is not often that the same character is released by two different vendors at the same time, however this Mystique custom minifigure has been released by both Christo and Phoenix Customs. You can read about the Shapeshifter Custom Minifigure by Phoenix Customs.
This Mystique Custom Minifigure by Christo is a high quality pad printed minifigure and features a single sided printed head, front and back torso print, arm printing, and printed front legs. She also comes with a fantastic custom hair piece.
As the character is so popular I would imagine that X-Men collectors will buy both versions.
You can buy this Mystique Custom Minifigure at Minifigures.co.uk now.