OZO on the Nokia 8 is NOT related to the camera tech.
There's no work done by the OZO team on any of the HMD devices. The OZO tech on the Nokia 8 is regarding SOUND capturing.
So you can't compare them because they're not the same thing.
HMD hasn't used, however, ANY of the PureView tech on the Nokia 8 either (which is why the camera results are so bad). They could have asked the OZO team to help on the imaging as well and eventually they'll be forced to do so. Because, you know...OZO's current head of imaging is Juha...the former head of imaging at Nokia during the PureView years