Looking at the rear panel, it looks like a 11 or 13th gen NUC board in a more fancy case.
Not surprising, since the Intel boards used in the original Nucleus/Nucleus+ are no longer available (at least not in quantities - you can still get them from various Internet vendors, but not from Intel directly).
Lets hope they have also switched to much more reliable (albeit more expensive) Samsung SSDs, which will improve the overal reliability of the system.
If you don’t have a vast library of 20-30k albums, you will be perfectly fine with the current Nucleus+. I would rather spend the money on a quality linear PSU or a good end point like SOtM sMS-200Ultra Neo (if you are using USB connection to your DAC) than on extra CPU power you may never need/use.