I haven't quite finished building the new 9493 X-Wing, so until I have, please make do with pictures of the minifigs.
The set comes with four, two of which are new.
The first new one is Jek Porkins, left, who was pilot of 'Red Six' X-Wing. He was killed in the Battle of Yavin. You may recall his cockpit filling with smoke when his X-Wing was hit by enemy fire. His helmet and head are unique, and LEGO has done a good job on the markings on the helmet, which look close to those shown in the image.
The second new one is Jek's astromech droid R5-D8. This uses the new conical dome part for its head.
On first glance you could question why LEGO has included two pilots and two mechs. It becomes clear when you view the instructions: you can build either Luke's or Jek's X-Wing: there's an extra set of tiles and stickers in the box to mark up the wings with a 6th red stripe to indicate Jek's machine.
If I can get the X-Wing in my light tent I'll photograph it tomorrow...