Cool to see a reef celebrity
On topic, I suppose it also depends on where you live and the temperature balance as removing residual heat from a pump might need to be offset by the aquarium heater (Canadian winters!), could possibly be even less efficient overall. Obviously every case is completely different and it's a matter of understanding your system and its components. Same situation as how watts/gallon still persists even though it means nothing.
To add to this discussion in my case for submersible pumps I recently switched a Sedra 9000 which had an impeller issue (unit itself was buzzing) and frankly was too small for my setup anyway for an Eheim Compact 5000+ and love it so far. Having the adjustable flow right on the pump saves the plumbing and head loss from any sort of flow adjuster above the pump. While not dead silent, it's got a very tolerable frequency of sound. Plus the pump is comically small compared to the Sedra, about half the size and ~1.5x stronger. You can also crank it down to the same flow as the other pumps if required, and it gives a fairly large range for a potential upgrade later.