But the most important part of the hardware - the CPU/GPU (and probably the memory, storage and bus technology) - will be upgraded. That is the gain.No redesign = no buy.
why would I go out and risk on an AS cpu if there is no gain on the hardware? Very odd.
My bets the 16” is an 10th gen intel,
The size and shape of an aluminium box don't have much to do with it apart from mostly aesthetic considerations.