K0422 turbo compressor upgrade

So I am in the process of rebuilding my turbo and I saw those upgraded compressors that vw guys put on their cars and if anyone had tried this on their speeds let me know the affects of upgrading that part

 

I can’t say for others, but I’ve had my eye on CHRA upgrades for the OEM turbo I took out of my MS6. It was leaking oil and I bought a cheap K04 ‘rebuild’ ($280) to use temporarily and it seems to work fine. But my goal is to eventually rebuild the OEM one.