Description
In Power Consumption on Arduino Boards the image shows the PPK2 being connected to GND and VIN on what must be an Arduino UNO R4 WiFi. The PPK2 can only supply 5V AFAIK (I've used this and I see 5000mV and end of scale in the screenshots) and powering via VIN goes through the regulator with a "Recommended input voltage (VIN) is 6-24 V" for VIN.
The R4 might cope with 5.0V on VIN due to its buck converter as opposed to the R3's voltage regulator which would end up powering the microcontroller at 4 and a bit volts. I suspect the test results are higher than if it was used within the R4-specified input voltage range.
What pins were actually used for the testing for each board to power them?
BTW, it's a useful article. I have used the PPK2 too and it's a great little tool for a hobbyist.