Does anyone know whether the MK2s has the older processor like the Fenix 6s or does it have the new processor that is in the 945LTE?

I'm primarily looking for a running watch, but I'm considering the Fenix/Descent watches for the maps and other sport modes. The 945LTE released around the same time as the Descent MK2s, but the Forerunner has the new Elevate V4 sensors and a new processor according to reviews that makes it faster than the older 945 and Fenix 6 series. While it's kind of a bummer the Descent MK2s has the older V3 sensor array, I also wondered whether this meant it used the older processor too. The 945LTE is definitely faster in moving through menus and loading maps from a video I saw. Seems like Garmin doesn't publish this as a spec, but if anyone upgraded to the Descent from the Fenix 6 line, is the performance about the same or is it faster?