Hi Alan,
you’ll find a lot of info in this thread:
Optimum Sensocomfort settings are hard to tell - are you talking about user-level or installer-level settings?
Do you also have a Sensonet to connect your installation to the Vaillant app? There you can see COP values as well.
In general,. Vaillant temperature sensors are a bit imprecise so it’s a gamble how accurate those numbers are (can go both ways).