This was discussed in length on Stellar Enhancements thread and after several tests it was concluded that for a pilot, the primary nature of stars would be their immerse brightness; details would not be visible and even colour would be a secondary feature due to human eye's (and brains') ability to adapt to white balance for different lighting conditions very fast. Colour of the star has more of an impact on the lighting than the visual appearance of the star.
Not to mention the fact that at Earth distance, Sol is about half a degree wide (same size as full moon from Earth's surface), approximately anyway. Don't try this at home, but you really couldn't see any details on the sun even if you were dumb enough to look at it directly with plain unprotected eyes. If you used welding glasses or other tinted material to reduce the brightness, you could probably see the biggest sun spots but not really that well, and flares and protuberances would be right out of view... plus you would kinda have harder time seeing them enemy fighters clearly.
