I AM NOT A MATHEMATICIAN! nor do I pretend to be clever... just trying to help
Lets do some calculations here.
You have .510 firmware, I have .475 (yeah, I know… Don’t have app to change build prop)
Your .510 firmware
Of the 5% of battery used, 37.4% is from radio. This means 1.87
1.87/507=0.003688% OF TOTAL BATTERY USED per MINUTE
My .475 firmware
Of the 31% battery used, 7.8% is from radio. This means 2.418
2.418/427=0.005663% OF TOTAL BATTERY USED per MINUTE
Factors like signal strength would have a far larger factor of variance. I dunno how good your signal/reception is, but for reference mine is full bars.
But assuming environment is equal, my .475 firmware is using 40+% more power than your .510 firmware.
In fact, wifi signal strength also matters, by which point it could render my calculation above totally irrelevant!
Any new apps that got included in update that might send data?
Any new installs since of apps since your memory / recollection with .475?