This what I see. I'm using my GPU to render, not the QSV setting. Just didn't know if Magix was using an .mp4 version of the MC codec, as the other MC codecs listed are mpeg 1 &2; or if was missing an actual Magix render codec.
I just ran the ffmpeg6 objective quality measurements comparing vbr 24/48 and crf23, which yield similar bitrates, and they yield very similar quality across the board for x264 transcodes. Also compared transcodes using default template settings in vp21 Magix AVC which come in slightly lower in quality. For perspective, I also ran ffmpeg6 under Vegas using CuminCode Frameserver which is as close as a Vegas plugin can get at the moment to an ffmpeg-quality render.
I've updated the quality chart I posted earlier to include Resolve Studio... attempting to match output bitrates from Resolve as closely as the codecs permit (some of which are a little flaky when it comes to limiting the bitrate):