As I said i would ask Vantrue about their findings.
Here is their reply about clear hdr.
2. **What type of HDR is Vantrue using on the Nexus 5 Sony Starvis 2 IMX675? Clear HDR OR DOL HDR?**
We employ DOL HDR for the Nexus 5 Sony Starvis 2 IMX675.
3. **Has Vantrue had any problems with Sony's claim about their Clear HDR not working as expected?**
We have encountered issues with Clear HDR, as it has not delivered the expected results. We maintain ongoing communication with the SONY factory to collaboratively address and improve this matter. However, we are unable to specify a precise timeline for when these expected results will be achieved, as this is beyond our control.
It seems Vantrue also has trouble with Sony's clear hdr.