All good chap.

At stock this is Precision Boost/Extended Frequency Range in operation. Based on loading/headroom you'll see cores boost and when highest XFR is reached you'll see ~1.5V. The max column sorta gives the wrong picture if you get what I mean. For example the XFR frequency would have bounced across differing cores, so it would seem from that data the CPU as a whole was getting ~1.5V, but it would not have. The average is lower, this "switching" is also way faster than what SW monitoring can relay as well.

Statuscore is neat little app to load selective cores, see clocks and how boost works.

CPU Core Voltage (SVI2 TFN) is comparable to say a measurement via DMM at socket, this reading has a 6.25mV granularity. VCORE read back from ITE IT8665E is a bit pants, that has granularity of 21.8mV. Unfortunately both of these is just one reading and not per core, VID request is per core.