I use a Marantz processor with Audyssey (the upgraded version with the calibrated mic) and my streamer uses ARC. I also have two amps that power my rear surround channels and rear height channels that use ARC. You can see the graphs of both in my profile.
Audyssey does a MUCH better job of integrating the subs with the speakers and overall bass management. It also does a much better job with channel separation and the soundstage. I have a very well treated room so DSP changes are readily apparent. This is something I experienced, not read in a review. Your post is extremely shallow you have obviously 0 experience with the upgraded version of Audyssey.
Well, since you never "experienced" it at least you can read the review 🙄:
https://www.soundandvision.com/content/audyssey-multeq-x-room-eq-software-review