Haven't looked at MagicYUV in some time so I pulled down the update and tried it in vp22. I've never installed the trial version before on my laptop so I am able to do quality analysis without watermarks for a short while. The results are higher than I ever got before with older versions... I compared with other high quality render templates in Vegas 22 and also took a screen shot of the folder to illustrate render-file sizes:
The hevc lossless source clip I used is 10-bit 4:2:0. The 1st 3 renders are also 4:2:0. The Magix av1 render is 8-bit at the highest bitrate that rendered for me without error. The Magix MainConcept hevc render is 10-bit at its highest bitrate. The ProResHQ is 4:2:2 so I also did a MagicYUV 4:2:2. Psnr doesn't seem to like MagicYUV but VMAF scores it the highest with equal scores for both 4:2:0 and 4:2:2.
Here's a more comprehensive roundup illustrating just how amazing MagicYUV is considering it's a 3rd Party encoder using the same Vegas data feed api as Voukoder Classic/Pro and Debug Mode Frame Server... suggesting they can do better.
For perspective, I also threw in the Magix presets at their maximum bitrates as well as ProResHQ. All the ffmpeg derivatives are rendered with the FFV1 lossless encoder widely used for archiving whose output Vegas cannot read. Vegas does read the lossless MagicYUV renders, which I suspect is the upper output quality limit of Vegas.