I find Apple Maps to be a much more pleasant app to use, though that's at least partially down to it being permitted to do things Google aren't on iOS (nav on the lock screen, syncing with the Watch etc.)
In my experience it also has more accurate lane guidance and, as you say, better delivery of audible driving directions ("go through these lights then, at the roundabout, take the first exit"). Google Maps also has an annoying habit of choosing the quickest route at all costs which, in certain parts of the country, involves going miles down single-track country lanes (which legally have a speed limit of 60 but more than 30 would put you through a hedge or into an oncoming tractor) when a dual carriageway A-road would be only 2-3 minutes slower. I can't say Apple Maps doesn't do this, but anecdotally it seems to do it less.
However the business info is still way behind Google, particularly regarding things like temporary closures.
Could Apple Maps on WearOS work as well as Google Maps, or does Google Maps there get special integration with something like Google Play Services?
WearOS in general seems to be much more restricted than Android with things like sideloading and restricting third-party stores, but I don't know if there are also things like the Google Play Services system privileges of google-Android proper.
In my experience it also has more accurate lane guidance and, as you say, better delivery of audible driving directions ("go through these lights then, at the roundabout, take the first exit"). Google Maps also has an annoying habit of choosing the quickest route at all costs which, in certain parts of the country, involves going miles down single-track country lanes (which legally have a speed limit of 60 but more than 30 would put you through a hedge or into an oncoming tractor) when a dual carriageway A-road would be only 2-3 minutes slower. I can't say Apple Maps doesn't do this, but anecdotally it seems to do it less.
However the business info is still way behind Google, particularly regarding things like temporary closures.