Don't think they changed CPU, looks identical inside except for 128GB of internal storage (instead of 256GB) and aluminum chassis instead of SS/CU. But they did improve output of BAL, from 3.9Vrms to 4.2Vrms and improved SNR to 123dB. Weight is cut in half, and size is smaller (with a display scaled down to 4.1" from 5"). Also, they announced about upcoming new FW, introduced with SP1000M and probably carried over to other DAPs where they are going to allow side-loading of APK files to load other streaming services (hopefully Spotify will work). And the price is reduced from $3.5k to $2.4k. Full announcement
here.
I have a feeling the sound will not be identical to SP1000, they have to differentiate from a flagship unless they are planning to kill it off.