There are lots of other things that *could* be different between a P DU and a S DU that wouldn't show up simply by looking at temperatures and would just be related to increased longevitiy under the higher loads. Off the top of my head different alloys could be used, different bearings or even just different bearing liners, the shafts could be balanced better, or the tolerances could be tighter. Similarly its possible that the certain components are built to the same drawing but then just binned based on the final dimensions with the better parts being allocated for the P DUs.
Note that I'm not claiming they are different, just that there could easily be differences that aren't immediately obvious even if you tore-down the inverters and motors and compared the two.
This also doesn't mean that flashing a S85 to a P85 wouldn't be quite successful for the long term, quite similar to how you can overclock many cpus without issue.
Note that I'm not claiming they are different, just that there could easily be differences that aren't immediately obvious even if you tore-down the inverters and motors and compared the two.
This also doesn't mean that flashing a S85 to a P85 wouldn't be quite successful for the long term, quite similar to how you can overclock many cpus without issue.