AI Sharpen on 2018 Mac Mini

Has anyone done any timing of AIS using the 2018 Mac Mini? I am assuming that with just the UHD630 graphics that CPU mode might be better on this machine. AIS is not cutting it on my 2015 15" rMBP with Radeon 370X 2gb. It’s actually faster on a 2011 PC build with a R9 270X with 2gb VRAM.

I’m deciding on a faster Mac or building a new PC as Windows handles 4k monitor scaling much better than MacOS.

Thanks, Lloyd