C'mon, anything is comparable.
I can compare a compact car to a school bus.
Some folk need to park in tight spaces while getting this weeks groceries.
Some folk need to transport 30 kids to school.
And some people need both vehicles.
If all I've driven is my bus, and I'm considering buying a compact car to compliment it, then maybe a comparison to it is exactly what I need as it's my only frame of reference.
These devices may differ greatly in one metric or another, but...