This it true, but it's a bit of a moot point. The 911 has dynamic engine mounts, the Boxster has dynamic transmission mounts, in the 911 the engine is above/between the rear wheels, in the Boxster it's the gearbox, the engine and gearbox are rigidly connected so the mounts of one are also the mounts of the other.However, the 981 DOES NOT have dynamic engine mounts. It DOES have dynamic TRANSMISSION mounts.
It's probably the most expensive element of the sports chrono package yet everyone talks about sport+ mode as if that's all you are getting. You may not use sport+ all the time, or the clock, or launch control, or the track mode mapper but you will use the mounts 100% of the time.