I would guess you "tried" the non-working AirPods Max store display unit. I have both. The AirPods Pro do not sound better.I remember trying the AirPods max and thinking they sounded bad. I don’t mean they sounded bad for the price, I mean they sounded bad.
I hope they do a lot better on the second attempt.
For the record I have AirPods Pro and think those sound great by comparison.