Every blind test I have seen the Max has better sound.
Do you have one where the HP has better sound?
"The real shock was the Google Home Max, a massive, 12-pound machine that’s supposed to be all about the sound; it sounded like cardboard compared with the HomePod and Sonos."
http://www.idownloadblog.com/2018/02/05/david-pogue-homepod-vs-google-home-max/
https://twitter.com/SnazzyQ/status/964197404730736640
We thought the HomePod sounded the best, with the Google Home Max at a close second, followed by the Sonos One.
The Google Home Max gets the loudest, but sound becomes somewhat distorted at the highest volumes, while the Sonos One offers robust sound that's not quite as good at a lower price point.
https://www.macrumors.com/2018/02/20/smart-speaker-showdown-homepod/
Overall, the HomePod and the Sonos One were the top two performers [in a shootout between HP, Sonos and G Max]. Listeners praised the HomePod's stronger and more robust bass, but it came at the expense of higher tones, such as vocals and high-pitched instruments, which sounded muddier, according to one person.
https://www.tomsguide.com/us/smart-speaker-showdown,review-5156.html
Apple HomePod sounds the best
We’ve had a chance to extensively test dozens of speakers and the HomePod is in fact the best sounding smart speaker on the market today. It sounds incredible with very balanced, deep, rich audio. It handles high and low volumes very well.
https://www.rizknows.com/buyer-guides/apple-homepod-vs-sonos-one-vs-google-home-max/
I thought my mind and ears were playing tricks on me (or maybe it was the placebo effect), but then I compared the HomePod to other smart speakers (second-generation Echo, Google Home, Sonos One, Google Home Max) and it quickly became clear: HomePod really does sound outstanding.
https://mashable.com/2018/02/12/apple-homepod-review/#E2e8jp6nDkqx
HomePod vs. Google Home Max
When companies who don't build speakers get into the speaker business, it's natural to have a fair bit of skepticism. Both Apple and Google fall into this general definition, but if we're being honest — Apple has been building speaker systems for years in its laptop, desktop, and smartphone lines. Google… less so. And it shows.
The Google Home Max is an embarrassment of a speaker for its cost: In isolation, the Max sounds decent enough, but when put in a ring against the cheaper Sonos One and HomePod, it's obvious just how much compression it puts on vocal and mid-tone tracks in the interest of big, booming sound.
Nowhere was this more obvious than the last song I heard as part of the test,
the Eagles' live version of Hotel California — the applause, guitar, reverb, and room tone all got squished. (It's especially telling that guitar picks and audience clapping had the exact same pitch, often blending into a single sound on the recording.) In contrast, both the HomePod and Sonos One delivered a rich, separated sound.
https://www.imore.com/homepod-vs-amazon-echo-vs-google-home-max-vs-sonos-one-speaker-showdown