I would say its a worth while upgrade if your willing to push it. If you plan to run 20psi, maybe not much of an upgrade, but once you start pushing things to their limits the HTA68 will shine over the Evo3 16G. On my set-up I can rev to 9K without feeling the power fall off, an Evo3 16G will fall off up top.

No porting, internally gated.

I was saying that the HTA86 aka HTA3586 was the best turbo I've owned.