You realize Garrett makes the Turbine and Compressor wheels to spec for HKS for the GT2530's? Garrett makes a slightly different spec for the GT2860's. This is like automakers like Honda with VTEC and a Toyota with VVTL. Call it what you want its still variable valve technology and its doing the same things without having to pay the other for its technology. Same holds true for the turbo comparison.
It's vice versa from what I have read. Check out Garretts website and look at the map. You could probably find the equivalent for the HKS.
I think you are going to have better luck finding Wonder Woman's invisible jet.