The materials and workmanship in a Forerunner 955 are almost the same as those in a Forerunner 255.
The latter disables the NFC payments radio on the same radio IC, disables recording power meter and etap/DI2 gear-shift data from bikes even though it has ANT+ radio, disables open-water swim mode, disables multi-sport (triathlon) tracking, disables maps (even though it has the same memory capacity), and doesn't implement the running dynamics/running power software.
It's like a premium printer that's identical to the cheap printer, with the speed inhibitor turned off:
https://www.joelonsoftware.com/2004/12/15/camels-and-rubber-...