Sunkissed is a recessive genetic mutation that causes a hypo effect. Some also view it as a pattern mutation as well, their heads have a distinct pattern to them, and their saddles tend to be somewhat more square; but the head pattern is the give away.

As far as I can tell, the Sunkist is not a sunkissed - I don't know the story behind them. But the one pictured doesn't look to be a sunkissed - just looks like a normal to me.