Interesting that your are so close, mine are worlds apart.
My last ramp test got me 335, while my “eFTP” on intervals.icu recently updated to 371.
Real life race context, I had a crit where I had a 23 minute normalized power of 370 watts ( it was a shorter crit and i removed the neutral start lap ) and a circuit race of 1:38 where my normalized power was 340 watts.
Other context, on another popular online platform, I did a 42 minute on the alpe, stood the whole time, 366 for 20 mins, 360 for 30, and 353 average for the 42 minute effort. ( I clearly faded near the end ) After the initial higher power 20-30 minutes I sort of settled into the 330-340 range and was able to bump the last section a touch higher again.