It does have some additional benefits over the Optimax, a higher RON (I think) but there is also a new additive that it supposed to reduce friction in the engine.

If you have been using premium fuels before, I doubt you'll notice much difference.

The anti-friction additive may help your engine a bit in the long run, it may also help if your always ragging it and spend all your time above 6000 revs!

I'll be putting this stuff in my tank when I pick up the ST on Friday.