I'm not sure why they'd be more stable than a normal Star TB. You're talking stable in terms of HSS, not overstable, right?
My 162g Star is plenty stable. I'm only getting it out a little past 350', but it holds a straight line the entire way and has a solid fade at the finish. I can get my 150g Champ to 375' and it holds a similar line, it's just easier to throw higher in the air for more distance for me.
I've admittedly never thrown one, but I'm highly skeptical that they'd be better than your average light Star or Champ TB. I'll try one out when I get the chance, but I seriously doubt that this Starlite stuff is anything more than a marketing gimmick when it comes to 150 class discs that were already being made using Innova's older production methods. Just like a 175g Blizzard Dominator is no better than a Dominator without Blizzard on the label.