Talk to me about .64 turbine housings

As we know out gtir are standard .86 ar turbine housings, mainly for hp on the top end. Yes.

But I've been looking at a 2871 with a .64 turbine housing which I'm deeply considering buying. The turbo runs the same turbine wheel as a normal gtir/2871 it's just a slightly smaller housing which in turn make boost sooner and gives a larger power curve as the expense of hp right up top.

My question is does anyone have any genuine experience of running a .64 ar turbine on a gtir and how did you find it? I think/hope it would make for an extremely driveable car...

Any advice?

I've got one + am performance elbow and it starts boosting at around 2-2.5k rpm. Can't rly compare it to same tuby with .86 ar but on standard boost I didn't notice any power loss on top end. I'd personally recommend smaller housing if you'd be using can mainly on road